Kimberley Process Certificate Tanzania: How Rough Diamonds Leave and Enter the Mainland Lawfully
How does a rough diamond parcel get a Kimberley Process certificate in Tanzania? Only a mineral right holder or a licensed diamond dealer may export. The Mining Commission examines, weighs and values the parcel, collects the 6% royalty and 1% inspection fee, seals it, and issues the certificate on Form DTF2 under the Mining (Diamond Trading) Regulations, 2019. The certificate lapses after 30 days.
This guide explains the Kimberley Process certificate Tanzania issues for rough diamonds, and the import permit that runs the other way. It covers the legal basis, who may export, valuation, royalty and inspection fee, the export permit, the Williamson mine, imports for cutting, the Zanzibar position, penalties, and a costed parcel export in US dollars.
Who should read this
- Licensed mineral dealers who buy rough diamonds from small-scale miners and want to export them.
- Mining licence holders with kimberlitic diamond production, including the operator at Mwadui.
- Foreign buyers in Antwerp, Dubai, Mumbai or Tel Aviv who need a clean certificate with every parcel from Tanzania.
- Cutters and lapidaries who plan to import rough diamonds into Tanzania for cutting and polishing.
- Anyone in Zanzibar asked to handle rough diamonds, where the Mainland mining law does not apply.
Readers new to mineral trade should start with our guide to how gemstone and diamond trading differs from gold, then come back here for the diamond-specific layer.
What the law says
The Kimberley Process Certification Scheme is an international scheme for rough diamonds. Its core document, as amended on 22 November 2013 and hosted by the World Diamond Council, requires each participant to ensure that every exported shipment "is accompanied by a duly validated Certificate". Imports need the same. Trade with non-participants is barred. Rough diamonds are stones that are unworked, or no more than sawn, cleaved or bruted, under HS codes 7102.10, 7102.21 and 7102.31.
Tanzania joined in 2003, according to the Kimberley Process participant page for Tanzania. Domestic law gives the scheme effect through the Mining Act and one set of diamond regulations.
| Instrument | What it does | Effect for a diamond exporter |
|---|---|---|
| Mining Act, Cap. 123 R.E. 2023, s.2 | "This Act shall apply to Mainland Tanzania" | Everything below is Mainland law |
| Cap. 123 ss.23 and 24 | Establishes the Mining Commission; s.24(r) gives it the duty to "sort and assess values of minerals" | The Commission values the parcel |
| Cap. 123 s.19(1) and (3) | Limits possession to right holders, dealers, brokers and import permit holders; limits export to right holders and licensed dealers | Brokers and unlicensed buyers cannot export |
| Cap. 123 s.19(4) | Penalty for unlawful dealing or export | Fines in shillings, prison, or both |
| Cap. 123 ss.98 and 99 | Minerals Import Permit and import regulations | Imports need a permit |
| Cap. 123 s.111 and s.115 | Royalty and inspection fee | 6% and 1% of gross value (F0624, F0625) |
| Mining (Diamond Trading) Regulations, 2019, GN 137 of 2019 | The Kimberley Process rules: export certificate, import permit, transit, records, offences | The core instrument for this guide |
| Mining (Minerals and Mineral Concentrates Trading) Regulations, 2018, GN 2 of 2018 | Dealer and broker licences and the general export permit | Licence fees (F0622, F0623) and export permit fee (F0628) |
We read the Act in the Revised Edition 2023 published by the Office of the Solicitor General e-Library. Older articles cite the 2019 consolidation, where the export rule sat in s.18(3) and the Commission in s.21. The TanzLII 2019 consolidation shows the old numbering. Cite the R.E. 2023 numbers in any filing.
The diamond regulations are GN 137 of 2019 on TanzLII, signed on 30 January 2019 and published on 8 February 2019. They are made under the Act's regulation power. They replaced the Mining (Diamond Trading) Regulations, 2003, GN 16 of 2003, which first brought the scheme into Tanzanian law. Clyde & Co (12 March 2019) lists GN 137 of 2019 among that year's new mining regulations.
Who may export rough diamonds from Tanzania?
Two groups only. Section 19(3) of Cap. 123 bars any export "unless he is a mineral right holder" or a licensed dealer. Regulation 7 of GN 137 of 2019 narrows that further for diamonds. An authorised miner or licensed dealer may export only with a Commission certificate showing that royalty, provisional royalty or a payment in lieu has been paid. The diamonds must also go to a Kimberley Process participant.
| Person | May export rough diamonds? | Basis |
|---|---|---|
| Holder of a mining or special mining licence over a diamond deposit | Yes, own production, with a certificate per shipment | Cap. 123 s.19(3); GN 137 reg. 7 |
| Holder of a primary mining licence producing diamonds | Yes as a right holder; most sell to dealers at a mineral market instead | Cap. 123 s.19(3); s.32 |
| Licensed dealer, diamonds class | Yes, with a certificate per shipment | Cap. 123 s.19(3); GN 137 reg. 7; F0622 |
| Licensed broker | No. A broker buys and sells locally only | Cap. 123 s.19(3); F0623 |
| Visitor or tourist who bought a rough diamond | No lawful route without a dealer exporting on a certificate | GN 137 regs. 7 and 9 |
The dealer licence is the usual route for a trading business. Our register shows a non-refundable application fee of USD 200 and a diamonds-class licence fee of USD 2,000, with the same amount on renewal (F0622). The licence-holding company must be at least 25% Tanzanian-held. Our guide to the mineral dealer licence sets out the application.
Brokers sit one step below. A broker licence costs TZS 50,000 to apply and TZS 200,000 to issue (F0623). It is open only to Tanzanians and local companies, and brokers may not export. Our mineral broker licence guide covers the role.
How is a Kimberley Process certificate issued?
Regulation 9 of GN 137 of 2019 sets the procedure. The certificate is the Commission's "Certificate of Exportation", Form DTF2, signed by the Executive Secretary. Tanzania's 2022 annual report to the Kimberley Process places the Kimberley Process Office inside the Mining Commission's Mineral Audit and Trade Department, under the Ministry of Minerals. That report lists two focal points and five officers authorised to sign certificates.
| Step | What happens | Basis |
|---|---|---|
| 1. Application | Exporter files Form DTF1 with licence details, carats, value, source and destination, and declares that no conflict diamonds are included | GN 137 reg. 9; 2022 KP report |
| 2. Application fee | Fee under the Second Schedule, paid against a control number | GN 137 Second Schedule |
| 3. Examination and weighing | The Commission examines and weighs the parcel | GN 137 reg. 9 |
| 4. Valuation | The Commission values the parcel at its Kimberley Process Office | Cap. 123 s.24(r); 2022 KP report |
| 5. Royalty and inspection fee | 6% royalty and 1% inspection fee on the assessed value | Cap. 123 ss.111, 115; F0624, F0625 |
| 6. Sealing | Diamonds packed in tamperproof containers, sealed at every opening with a Commission seal or an approved seal | GN 137 reg. 9; KP core document |
| 7. Certificate | Form DTF2 issued, valid for 30 days | GN 137 reg. 9 |
| 8. Export and surrender | The exporter surrenders the certificate to the importing authority at destination | GN 137 reg. 9 |
The certificate lapses in three cases. Export does not happen within thirty days of issue. A seal or container is broken before inspection. The certificate is tampered with. Regulation 11 also lets the Commission invalidate a certificate if the information behind it was inaccurate or has changed.
The Second Schedule prints the application fee for the certificate. That amount is not yet a line in the Zatra fee register, so we do not repeat it here; the Commission assesses the charge on filing.
Who values the parcel, and what is paid on it?
The Mining Commission values it. Older guidance refers to a "Government Diamond Valuer" or to the former Tanzania Minerals Audit Agency; neither appears in GN 137 of 2019. Section 24(r) of Cap. 123 gives the Commission the duty to sort and assess mineral values, and s.24(s) to "produce indicative prices of minerals". The 2022 report to the Kimberley Process states that valuation takes place at the KPCS office.
Section 127 of the Act deals with sorting and valuation, and s.114 provides for a sorting and valuation fee. Our register has no amount for that fee. The Commission assesses it on filing where it applies.
| Charge | Amount | Register ID |
|---|---|---|
| Royalty on rough diamonds | 6% of gross value | F0624 |
| Royalty on cut and polished gems | 1% of gross value | F0624 |
| Inspection fee | 1% of gross value, before clearance for export | F0625 |
| HIV Response Levy | 0.1% of gross value, paid with royalty | F0626 |
| Mineral export permit application | USD 100 | F0628 |
| Kimberley Process certificate application | Assessed by the Commission on filing | Not on register |
| Sorting and valuation fee, where charged | Assessed by the Commission on filing | Not on register |
| TASAC clearing of minerals by air | USD 50 for samples up to USD 2,000 where value exceeds USD 5,000,000, per air waybill | F0390 |
The valuation drives every percentage line, so raise any disagreement in writing before paying. Our guide to royalties, inspection fees and export controls explains how royalty, the inspection fee and clearance fit together.
A dealer who bought from a primary licence holder will usually have withheld 2% of the purchase price as final withholding tax (F0629). That is a tax on the seller's income. It is not a credit against the exporter's royalty.
What does the mineral export permit add?
The Kimberley Process certificate is the diamond-specific document. The general mineral export permit under GN 2 of 2018 sits beside it. Regulation 7 of GN 137 refers to diamonds going to a participant "under the Export Permit", which shows the two travel together. The register records the export permit application fee as USD 100 (F0628).
Our full guide to the mineral export permit in Tanzania covers the permit form, seals and the export procedure. For diamonds, plan for both documents in one sitting at the Commission. The certificate will not issue without the royalty and inspection fee receipts, and the permit will not issue without the certificate.
Clearing is the last step. TASAC holds the exclusive mandate to clear minerals and charges per air waybill (F0390).
How does the Williamson mine fit in?
The Williamson mine at Mwadui, in Shinyanga Region, is Tanzania's main source of rough diamonds. It is an open-pit kimberlite operation run by Williamson Diamonds Limited. In 2022 it exported 346,290.51 carats worth USD 104,772,316.01, about 91% of national production, according to the 2022 Kimberley Process report. Small-scale miners produced the other 34,394.54 carats.
Ownership changed in 2025. Mining Technology (23 January 2025) reported that Petra Diamonds held 75% and the Government of Tanzania 25%, and that Petra agreed to sell its whole stake to Pink Diamonds Investments, a Taifa affiliate. The Daily News (16 May 2025) reported completion, for up to USD 16 million, after Fair Competition Commission approval.
National figures follow Williamson's output, as the Kimberley Process statistics show.
| Year | Exports (carats) | Export value (USD) | Certificates issued |
|---|---|---|---|
| 2021 | 47,197.17 | 24,198,874.08 | 69 |
| 2022 | 381,290.62 | 114,509,524.01 | 97 |
| 2023 | 191,336.29 | 23,529,001.95 | 47 |
| 2024 | 373,678.91 | 53,452,674.52 | 28 |
| 2025 | 374,105.26 | 52,907,592.20 | 51 |
The 2022 report gives slightly different totals: 380,685.05 carats and 98 certificates. Average value fell from about USD 300 a carat in 2022 to about USD 141 in 2025, so budget on current prices, not last year's average.
Can rough diamonds be imported for cutting?
Yes, with a permit. Regulation 8 of GN 137 of 2019 allows import only by authorised miners, licensed dealers, licensed brokers or authorised lapidaries. The diamonds must come from a participant, and the importer needs a Commission import permit.
- Apply on Form DTF3 with a declaration that the diamonds come from a participant and contain no conflict diamonds (reg. 10).
- Receive the permit on Form DTF4. It is void if the goods are not imported by the stated date.
- Hold the goods at customs. The Collector of Customs may not release them until the Commission confirms the permit on Form IC-1.
- Allow the inspection. The Commission checks the seals and container, opens the parcel and compares it with the foreign Kimberley Process certificate.
- Keep the endorsed permit. The Collector endorses the permit and returns it as the importer's authority to possess the diamonds.
The Second Schedule sets an import permit application fee. It is not on our register, so the Commission assesses it on filing. Imports are rare: the 2022 report mentions one shipment, from India.
Cutting in Tanzania needs its own licence on top of the import permit. Our mineral processing licence guide covers the licence family. Polished stones leave as gems, at the 1% royalty line for cut and polished gems (F0624). Confirm with the Commission that polished diamonds fall in that line before pricing.
What happens to diamonds in transit?
Regulation 12 of GN 137 gives the Commission power over rough diamonds passing through Tanzania. It may seize transit diamonds that have no Kimberley Process certificate or arrive in an opened container. Where a certificate exists but the container has been opened, the diamonds may be returned to the participant that issued it.
Forwarders handling transit parcels should treat an opened seal as a stop and call the Commission.
What records and returns must a diamond trader keep?
Regulation 13 requires authorised miners, dealers and brokers to keep an accurate register of receipts, despatches and disposals. Each entry is signed when made. Daily records of mining, buying, selling and exporting, with client names, licence numbers, amounts and values, are kept for five years.
Regulation 14 sets the monthly return. A certified duplicate of the previous month's register entries reaches the Commission by the third day of each calendar month.
Purchases should also run through the mineral markets. Section 32 of Cap. 123 requires a person who buys or disposes of minerals to do so at the Mineral and Gem Houses, with an exception for mining and special mining licence holders. Our guide to mineral markets in Tanzania covers how they work.
Where does Zanzibar stand?
The Mining Act, Cap. 123, applies to Mainland Tanzania only (s.2). GN 137 of 2019 is made under that Act, so the diamond regulations are Mainland law too. The Mining Commission is a Mainland body.
The Kimberley Process participant is Tanzania as a whole. Customs is a Union matter administered by TRA on both sides. We could not confirm, this session, a Zanzibar statute or regulation that governs rough diamond trading or issues a certificate in Zanzibar. We know of no diamond production in Zanzibar.
The practical rule: do not route rough diamonds through Zanzibar without written confirmation from the Mining Commission and the Zanzibar authorities. A Mainland certificate still needs an unbroken seal and export within its 30 days.
Worked example: a licensed dealer exports a 1,200-carat parcel from Shinyanga
Almasi Trading Limited is a hypothetical company in Shinyanga. It holds a diamonds-class dealer licence and is 40% Tanzanian-held. It has bought 1,200 carats of rough diamonds from primary licence holders at the regional mineral market, withholding 2% on each purchase (F0629). It plans to fly the parcel to a buyer in the United Arab Emirates, a Kimberley Process participant.
Valuation. The Commission examines, weighs and values the parcel. Assume an assessed value of USD 300 a carat, close to the 2022 national average. The gross value is 1,200 x USD 300 = USD 360,000.
| Item | Basis | Amount (USD) | Register ID |
|---|---|---|---|
| Royalty | 6% x 360,000 | 21,600 | F0624 |
| Inspection fee | 1% x 360,000 | 3,600 | F0625 |
| HIV Response Levy | 0.1% x 360,000 | 360 | F0626 |
| Mineral export permit application | Flat | 100 | F0628 |
| Subtotal of register charges | 25,660 | ||
| Kimberley Process certificate application | GN 137 Second Schedule | Assessed on filing | Not on register |
| Sorting and valuation fee, if charged | Cap. 123 s.114 | Assessed on filing | Not on register |
| TASAC air clearing | Per air waybill, by value band | Between 50 and 2,000 | F0390 |
The known government charges come to USD 25,660, or about 7.1% of the parcel value, before the certificate fee and clearing. The annual dealer licence of USD 2,000 (F0622) is an overhead, not a per-parcel charge. At USD 250 a carat, royalty would fall to USD 18,000.
Timeline. These are planning assumptions, not official service standards.
- Day 1. Almasi files Form DTF1 and the export permit application, with its licence and purchase records.
- Days 2 to 5. The Commission examines, weighs and values the parcel; Almasi pays royalty, inspection fee and levy against control numbers.
- Days 5 to 7. The parcel is sealed and the DTF2 certificate and export permit issue.
- Within 30 days of issue. The parcel flies; TASAC clears it; the buyer surrenders the certificate to the importing authority.
- By the 3rd of next month. Almasi files its certified register return with the Commission.
If the flight slips past day 30, the certificate lapses and Almasi applies again.
What are the penalties for smuggling or false declarations?
The Act sets shilling fines; the diamond regulations add dollar fines, licence loss and forfeiture.
| Breach | Penalty as set by law | Source |
|---|---|---|
| Possessing, dealing in or exporting minerals without authority, individual | Fine not less than TZS 10,000,000 and not more than TZS 50,000,000, or 1 to 3 years in prison, or both | Cap. 123 s.19(4) |
| Same, body corporate | Fine not less than TZS 50,000,000 and not more than TZS 100,000,000 | Cap. 123 s.19(4) |
| Offence under the diamond regulations, individual | Prison up to 3 years, fine up to USD 20,000, or both | GN 137 reg. 17 |
| Same, body corporate | Fine up to USD 100,000 | GN 137 reg. 17 |
| Additional consequences | Licence cancellation; permanent disqualification from prospecting, mining or dealing in diamonds and other minerals | GN 137 reg. 17 |
| Diamonds obtained in breach | Forfeited | GN 137 reg. 17 |
| Transit parcel without certificate or with opened container | Seizure or return to the issuing participant | GN 137 reg. 12 |
Customs and criminal statutes can add charges not covered here. Any seizure, arrest, charge or forfeiture notice goes to an advocate at once. Keep every receipt and seal record.
What to do now
- Confirm your licence. Check that the dealer licence carries the diamonds class and is current, and that the 25% Tanzanian holding is in place.
- Clean your supply chain. Buy only through mineral markets or from licence holders, withhold the 2%, and record every purchase in the reg. 13 register.
- Check the destination. Confirm the buyer's country is a Kimberley Process participant before you sign a sale.
- Book freight first. Fix the flight inside the 30-day life of the certificate before you file.
- File DTF1 and the export permit together. Present the parcel for examination, weighing and valuation.
- Pay against control numbers. Settle royalty, inspection fee and levy at the official rate, and keep the receipts with the parcel file.
- Protect the seal. Never open a sealed container before the destination authority inspects it.
- File the monthly return. Send the certified register copy to the Commission by the third day of each month.
Key dates and deadlines
| When | What | Basis |
|---|---|---|
| Before any export | Royalty, inspection fee and levy paid, or security given | Cap. 123 s.19(3); F0624 to F0626 |
| Within 30 days of issue | Export the parcel, or the certificate lapses | GN 137 reg. 9 |
| By the date on Form DTF4 | Import the diamonds, or the import permit is void | GN 137 reg. 10 |
| By the 3rd day of each month | Certified register return to the Commission | GN 137 reg. 14 |
| Five years | Keep daily mining, buying, selling and export records | GN 137 reg. 13 |
| On renewal of the dealer licence | Renewal application USD 100 and renewal fee USD 2,000 | F0622 |
How Zatra helps
Zatra's Tanzania mining services team prepares dealer licence files, diamond export and import applications, register formats and monthly returns. We check the parcel file before it reaches the Commission, and we coordinate with clearing agents. Our import and export compliance service handles the customs side.
Costs sit in two separate buckets. Government fees, royalty and levies are paid at the official rate to the Mining Commission, TASAC and TRA, against a GePG control number. Zatra's professional fee is quoted on its own line and never mixed with them.
The Mining Commission values every parcel and decides every certificate and permit. Zatra prepares and coordinates, but does not decide or guarantee any authority's outcome. Seizures, prosecutions, valuation disputes that become litigation, and formal legal opinions go to an advocate.
Sources and status
Accurate as at 31 October 2026.
- The Mining Act, Cap. 123 R.E. 2023: Office of the Solicitor General e-Library, Government Printer, 1 Jul 2025. Accessed 31 Oct 2026.
- Mining (Diamond Trading) Regulations, 2019, GN 137 of 2019: TanzLII, 8 Feb 2019. Accessed 31 Oct 2026.
- Mining (Diamond Trading) Regulations, 2003, GN 16 of 2003: TanzLII, 31 Jan 2003. Accessed 31 Oct 2026.
- Mining Act, Cap. 123, consolidation as at 30 November 2019: TanzLII, 30 Nov 2019. Accessed 31 Oct 2026.
- Kimberley Process participant page: Tanzania: Kimberley Process, statistics to 2025. Accessed 31 Oct 2026.
- Tanzania annual report to the Kimberley Process, 2022: Mining Commission via Kimberley Process, 2023. Accessed 31 Oct 2026.
- Kimberley Process Certification Scheme core document: World Diamond Council, as amended 22 Nov 2013. Accessed 31 Oct 2026.
- Regulatory changes in Tanzania's mining sector: Clyde & Co via Mondaq, 12 Mar 2019. Accessed 31 Oct 2026.
- Petra divests stake in Williamson Diamonds to Pink Diamonds: Mining Technology, 23 Jan 2025. Accessed 31 Oct 2026.
- Petra completes Williamson Diamonds exit: Daily News, 16 May 2025. Accessed 31 Oct 2026.
- Zatra fee register, line IDs F0390, F0622 to F0626, F0628 and F0629 as cited in the text: Zatra Consultants, 2026. Accessed 31 Oct 2026.
Figures to confirm before you act
- Certificate and import permit fees: the GN 137 Second Schedule amounts, and whether any later notice has changed them
- Sorting and valuation fee: whether the Commission charges the s.114 fee on diamond parcels, and at what rate
- Royalty already paid: how the Commission credits royalty paid on an earlier sale at a mineral market against the export assessment
- Polished diamonds: whether they fall in the 1% cut and polished gem royalty line (F0624)
- TASAC band: the exact per-waybill charge for a parcel of a given value (F0390)
- Williamson shareholding: the Government's stake after the 2025 sale to Pink Diamonds Investments
- Zanzibar: whether any Zanzibar law or authority certifies rough diamonds, and how a Mainland certificate is treated at Zanzibar ports
- Processing times: the Commission publishes no service standard for valuation or certificate issue
This article is general information based on official sources available at the date of publication. It is not legal, tax or financial advice. Laws and notices change. Verify with the issuing authority or consult Zatra before acting.
Frequently asked questions
Can a mineral broker export rough diamonds from Tanzania?
No. Section 19(3) of Cap. 123 limits export to mineral right holders and licensed dealers. A broker may buy and sell locally and, under GN 137 reg. 8, may import with a permit. To export, the broker must sell to a dealer or obtain a dealer licence in the diamonds class.
How long is a Tanzanian Kimberley Process certificate valid?
Thirty days from issue under regulation 9 of GN 137 of 2019. It also lapses if a seal or container is broken before inspection or if the certificate is tampered with. A lapsed certificate means a fresh application, so book freight before filing.
Who decides the value of a diamond parcel for royalty?
The Mining Commission. Section 24(r) of Cap. 123 gives it the duty to sort and assess mineral values, and the 2022 report to the Kimberley Process states that valuation happens at its office. The 6% royalty and 1% inspection fee are then charged on that value (F0624, F0625).
Can a tourist take a rough diamond home from Tanzania?
Not lawfully on their own. Every rough diamond export needs a Commission certificate issued to an authorised miner or licensed dealer under GN 137 reg. 7. A tourist who wants a stone should buy from a licensed dealer that exports it on a certificate, or buy a cut and polished gem with proper papers.
Can rough diamonds be sent to a country outside the Kimberley Process?
No. The scheme's core document bars trade with non-participants, and regulation 7 of GN 137 requires the diamonds to go to a participant. Check the Kimberley Process participant list before agreeing a sale with any new buyer.
Does a foreign-owned company qualify for a diamond dealer licence?
Only with local participation. The Zatra fee register records that a dealer licence-holding company must be at least 25% Tanzanian-held (F0622). The remaining shares may be foreign. A foreign shareholder working in the business also needs work and residence permits.
What happens if the seal on a parcel breaks during transit?
The certificate lapses under regulation 9. For a parcel passing through Tanzania, regulation 12 lets the Commission seize diamonds in an opened container without a certificate, or return certified ones to the issuing participant. Report the break to the Commission at once and take an advocate's view.
Does Zanzibar issue its own Kimberley Process certificates?
We could not confirm that it does. The Mining Act and GN 137 of 2019 apply to Mainland Tanzania only, and the Mining Commission is a Mainland body. Ask the Mining Commission and the Zanzibar authorities in writing before routing any rough diamonds through Zanzibar.
Sources & regulators
Verify before filing: Rates, forms and thresholds move by Finance Act, Government Notice and portal revision. Confirm the live schedule on the mandate-holder portal before you budget or submit. Law-firm alerts and Big Four notes are discovery only.
- The Mining Act, Cap. 123 R.E. 2023: Office of the Solicitor General e-Library, Government Printer, dated 1 Jul 2025; ss.2, 19, 23, 24, 32, 98, 111, 114, 115, 127 read 31 Oct 2026; primary source. Accessed 2026-10-31.
- Mining (Diamond Trading) Regulations, 2019, GN 137 of 2019: TanzLII, published 8 Feb 2019 (signed 30 Jan 2019); regs. 2 to 18 and Schedules read 31 Oct 2026 via the Laws.Africa publication PDF; primary source. Accessed 2026-10-31.
- Mining (Diamond Trading) Regulations, 2003, GN 16 of 2003: TanzLII, Gazette supplement 31 Jan 2003; historical, replaced by GN 137 of 2019; read 31 Oct 2026; primary source. Accessed 2026-10-31.
- Mining Act, Cap. 123, consolidation as at 30 November 2019: TanzLII, 30 Nov 2019; used only to map old section numbers (s.18(3), s.21); read 31 Oct 2026; primary source. Accessed 2026-10-31.
- Kimberley Process participant page: Tanzania: Kimberley Process, entry 2003, statistics 2004 to 2025; read 31 Oct 2026; scheme source. Accessed 2026-10-31.
- Tanzania annual report to the Kimberley Process, 2022: Mining Commission report to the Kimberley Process, 2023; KP Office, export procedure, Williamson share; read 31 Oct 2026; official report. Accessed 2026-10-31.
- Kimberley Process Certification Scheme core document: World Diamond Council, text as amended 22 Nov 2013; Sections III and IV and definitions read 31 Oct 2026. Accessed 2026-10-31.
- Regulatory changes in Tanzania's mining sector: Clyde & Co (Peter Kasanda, Amalia Lui, Esther Kilimba) via Mondaq, 12 Mar 2019; independent note listing GN 137 of 2019. Accessed 2026-10-31.
- Petra divests stake in Tanzania's Williamson Diamonds to Pink Diamonds: Mining Technology, Robert Sailo, 23 Jan 2025; independent report of the 75% and 25% shareholding. Accessed 2026-10-31.
- Petra completes Williamson Diamonds exit in 43.17bn/- deal: Daily News (Tanzania), 16 May 2025; independent report of completion. Accessed 2026-10-31.
Disclaimer
This article is informational orientation. It is not legal, tax or investment advice and not a government decision. Tanzanian instruments move by Act, Government Notice, Finance Act and portal revision. If a sentence here disagrees with the live mandate-holder, the mandate-holder wins. Zatra Consultants Limited does not issue licences, permits, tax clearances or approvals, and gives no assurance of any regulatory or banking outcome. Professional fees are published only on /pricing/.