Independent diamond valuation expert to review siu diamond valuation outcomes and process integrity (rfq168 2026/27)

Closing: 23 October 2026 at 11:00

• Date issued: 16 October 2026
• Briefing session or site visit: none indicated.
• Quotation validity: 90 days from the official closing date (a 30-day validity is also stated in the supporting documentation section).

Enquiries and submissions

• Submission email: [email protected]
• No named contact person or telephone number is provided.

SIU head office address

74 Water Meyers Street

Rentmeester Building, Meyers Park

First Floor

Submission method: email only

• Submission email: [email protected]
• Only submissions received at that address on or before the closing date and time are considered.
• Quotations must be on the bidder's company letterhead; a separate quote on letterhead is also required.
• Every page of the quotation must be signed by the responsible person.
• Bids must be submitted on the official RFQ forms provided; re-typed documents are not accepted.
• Faxed and emailed submissions are accepted, but the bidder carries the onus of confirming the SIU received them before the deadline.
• Any alteration to the RFQ document other than the bidder's details and price disqualifies the bid.
• Late and incomplete submissions are rejected.

Returnable documents

• Fully completed and signed RFQ document, including SBD 4 and SBD 6.1.
• SBD 4 (Declaration of Interest): discloses whether any director, shareholder or controlling person is employed by the state or connected to anyone at the SIU; an unsigned or incomplete form disqualifies the bid.
• SBD 6.1 (Preference Points Claim Form): claims the B-BBEE and specific-goal preference points.
• SBD 8 and SBD 9 declarations: confirm no restricted-supplier listing, no collusion and independent price determination.
• SBD 7 (Contract Form): completed and signed by the successful bidder.
• Proof of authority to sign, such as a company resolution.
• ID copies of company directors, CIPC registration, SARS PIN, CSD registration, and B-BBEE certificate or sworn affidavit.
• Comprehensive technical proposal addressing all scope items 1.1 to 1.18.
• CV of the Diamond Valuator Expert, at least three client reference letters, proof of diamond valuation qualifications, valid Dealer's Licence (section 32) and valid authorised representative licence (section 54).

Disqualification risks

• Unsigned quotation page or unsigned SBD 4.
• Non-compliant CSD tax status.
• Incorrect information in the SBD forms or supporting documents.
• Late or incomplete submissions.
• Listing on National Treasury's restricted suppliers or tender defaulters database, or being under investigation for corrupt activities.
• Failure to meet any eligibility requirement or to address the full scope of work.

• B-BBEE status level verification certificate or sworn affidavit.
• CSD registration.
• Quotation with a cost breakdown, VAT-inclusive where applicable, and every page signed.
• Quote valid for 30 days.
• Statutory documents: ID copies of directors, CIPC registration, SARS PIN, B-BBEE certificate or sworn affidavit, and the fully completed and signed RFQ including SBD 4 and SBD 6.1.
• SBD 4 (Declaration of Interest) and SBD 6.1 (Preference Points Claim) must be completed and signed.
• SBD 7 (Contract Form) is signed by the successful bidder.
• Proof of authority to sign, such as a company resolution.

System: 80/20 preference point system under the Preferential Procurement Regulations 2022, applied because the estimated value does not exceed R1 000 000.

• Price: 80 points.
• B-BBEE status level of contributor: 18 points.
• Specific goal — more than 50% black ownership: 2 points.
• Total available: 100 points.

B-BBEE points scale: Level 1 = 18, Level 2 = 14, Level 3 = 12, Level 4 = 10, Level 5 = 8, Level 6 = 6, Level 7 = 4, Level 8 = 2, non-compliant contributor = 0.

Evaluation stages

1. Responsiveness: the bid must meet all eligibility, mandatory and statutory criteria.
2. Price and preference scoring on the 80/20 basis.
3. Award conditions: the bidder must pass SIU Internal Integrity Unit screening and/or State Security Agency vetting, and must complete and sign the occupational health and safety agreement under section 37(2) of the Occupational Health and Safety Act. Failing screening can prevent award regardless of points scored.

No minimum functionality score is set. The SIU evaluates on best value, weighing the expertise, experience and technical proposal of the organisation and individuals and the organisational capacity behind the project team, rather than lowest price alone.

• The SIU may invite bidders to present their proposals before a final decision.
• The SIU may withdraw the quotation at any time, inside or outside the validity period.

Appointment of an independent, suitably qualified diamond valuator expert to assess the validity of diamond valuation outcomes and the integrity of the valuation process for the SIU.

Scope of work (items 1.1–1.18)

• Review all legislation, directives and prescripts applicable to diamonds.
• Review the specification and agreements between the service provider and any other relevant institution.
• Review all diamond valuation reports produced by both the current and the previous valuator.
• Assess the completeness, consistency and credibility of those reports.
• Test whether the reports meet recognised diamond valuation standards and best practice.
• Analyse the methodologies, assumptions, grading systems and criteria each valuator applied.
• Assess whether the 4 Cs (cut, colour, clarity, carat weight) were applied accurately and consistently.
• Identify deviations from industry norms, professional standards and ethical valuation practice.
• Compare the valuation results of the current and previous valuators in detail.
• Identify material variances in grading, valuation outcomes and value conclusions.
• Explain technical differences and judge whether they are reasonable or point to irregularities.
• Review the processes both valuators followed.
• Assess whether controls, documentation, chain of custody and verification procedures were adequate.
• Identify procedural weaknesses, non-compliance and red flags suggesting negligence, manipulation or misconduct.
• Flag indicators of wrongdoing, misrepresentation, conflict of interest or unethical conduct.
• Assess whether improper processes or external factors influenced the valuation outcomes.
• Analyse the diamonds selected for beneficiation and the 10% allocation.
• Perform any further procedure the SIU investigating team requires.

Deliverables

• Expert opinion on the likelihood and nature of any irregular conduct identified.
• A detailed written report covering findings, comparisons, observations and conclusions.
• Clear documentation of discrepancies, irregularities and potential wrongdoing.
• Expert opinions the SIU can rely on in investigative, disciplinary, civil recovery or criminal proceedings.
• Clarification or expert witness testimony in court or tribunal where required.

Contract period: once-off.

• Review all legislation, directives and prescripts relating to diamonds.
• Review the specification and agreements between the service provider and any other relevant institution.
• Review all diamond valuation reports prepared by the current and previous valuators.
• Assess the completeness, consistency and credibility of the reports.
• Evaluate compliance with recognised diamond valuation standards and best practice.
• Analyse the methodologies, assumptions, grading systems and criteria applied.
• Assess whether the 4 Cs (cut, colour, clarity, carat weight) were applied accurately and consistently.
• Identify deviations from industry norms, professional standards and ethical practice.
• Compare the valuation results of the current and previous valuators in detail.
• Identify material variances in grading, valuation outcomes and value conclusions.
• Explain technical differences and assess whether they are reasonable or indicate irregularities.
• Review the processes both valuators followed.
• Assess controls, documentation, chain of custody and verification procedures.
• Identify procedural weaknesses, non-compliance and red flags indicating negligence, manipulation or misconduct.
• Highlight indicators of wrongdoing, misrepresentation, conflict of interest or unethical conduct.
• Assess whether improper processes or external factors influenced the outcomes.
• Analyse the diamonds selected for beneficiation and the 10% allocated.
• Perform any other procedure the SIU investigating team deems necessary.

• CV of a Diamond Valuator Expert showing a minimum of 10 years' relevant experience in the diamond industry.
• Demonstrated knowledge of the 4 Cs (cut, colour, clarity, carat weight).
• Experience in inspecting precious metals and compliance with the Precious Metals Act.
• At least three client reference letters for diamond valuation projects.
• Proof of qualifications or certifications relevant to diamond valuation.
• Valid Dealer's Licence issued under section 32.
• Valid licence of an authorised representative issued under section 54 of the Principal Act.
• A comprehensive proposal addressing all scope items 1.1 to 1.18.

• Price must cover the entire scope of work plus any logistics or disbursements needed to deliver the final product within the set timelines.
• Price breakdown: rate per hour for 1x Diamond Valuator Expert; total quoted VAT exclusive.
• Quotations must reflect the correct cost per the specification; VAT-registered bidders must quote VAT-inclusive prices.
• A separate quote must be provided on the bidder's letterhead.
• All rates in South African Rand and firm for the bid period.
• No amendment of quotations after the closing date and time; the SIU may use its own calculated total when evaluating price and may seek confirmation of that total only.

Estimated ceiling: the project may not exceed R1 000 000.00 (all applicable taxes included).

Pricing format

• Price breakdown: rate per hour for 1x Diamond Valuator Expert; total quoted VAT exclusive.
• Price must cover the entire scope of work plus any logistics or disbursements needed to deliver the final product within the set timelines.
• VAT-registered bidders must quote prices inclusive of VAT.
• A separate quote must be provided on the bidder's letterhead.
• All rates in South African Rand and firm for the bid period.
• No amendment of quotations after the closing date and time; the SIU may use its own calculated total when evaluating price and may seek confirmation of that total only.

Payment

• Payment against deliverables achieved, within 30 days of receipt of invoice (30 working days from invoice date is also stated).
• No pre-payments; the SIU as a public entity is not permitted to make advance payments.
• No goods may be delivered or services rendered before an official order is received.

Eligibility and mandatory requirements (failure to meet these can disqualify the bid)

• Registered on the National Treasury Central Supplier Database (CSD).
• Tax compliant, with CSD Overall Tax Status showing compliant.
• Confirmation that the bidder has quoted and will deliver in line with the scope of work / terms of reference.
• CV of a Diamond Valuator Expert showing at least 10 years' relevant diamond industry experience, knowledge of the 4 Cs, precious metals inspection and compliance with the Precious Metals Act.
• At least three client reference letters for diamond valuation work.
• Proof of qualifications or certifications relevant to diamond valuation.
• Valid Dealer's Licence issued under section 32.
• Valid licence of an authorised representative issued under section 54 of the Principal Act.
• A comprehensive proposal addressing all scope items 1.1 to 1.18.

Statutory documents

• ID copies of company directors.
• CIPC company registration.
• SARS pin.
• B-BBEE certificate or sworn affidavit.
• Fully completed and signed RFQ document including SBD 4 and SBD 6.1.

Tax

• Bidders must submit their SARS-issued Tax Compliance Status PIN, or a printed TCS certificate, so the SIU can verify tax status; a TCS PIN can be applied for through SARS e-filing.
• Where no TCS is available but the bidder is registered on the CSD, the CSD number must be provided.
• Consortia, joint ventures and subcontractors must each submit a separate TCS certificate, PIN or CSD number.
• The onus is on the bidder to ensure the SIU holds a compliant tax status as reflected on the CSD summary report.

B-bbee

• A B-BBEE status level verification certificate, or a sworn affidavit for EMEs and QSEs, must be submitted to claim preference points.
• Certificates must carry a SANAS logo; affidavits must be commissioned by a Commissioner of Oaths and carry an SAPS stamp.
• Bidders who submit no B-BBEE proof, or invalid proof, score no preference points.

Exclusions

• No bids from persons in the service of the state, or from companies or close corporations whose directors or members are in the service of the state.
• Bidders on National Treasury's restricted suppliers or tender defaulters database, or under investigation for corrupt activities, are excluded.
• Appointment may be subject to SIU Internal Integrity Unit screening or State Security Agency vetting before commencement.

• A B-BBEE status level verification certificate, or a sworn affidavit for EMEs and QSEs, must be submitted to claim preference points.
• No B-BBEE proof, or invalid proof, means no preference points are awarded.
• Certificates must carry a SANAS logo; affidavits must be commissioned by a Commissioner of Oaths and carry an SAPS stamp.
• B-BBEE points under the 80/20 system: Level 1 = 18, Level 2 = 14, Level 3 = 12, Level 4 = 10, Level 5 = 8, Level 6 = 6, Level 7 = 4, Level 8 = 2, non-compliant = 0.
• A further 2 points are available for more than 50% black ownership.

• Award requires the bidder to have fully completed and signed the agreement on occupational health and safety under section 37(2) of the Occupational Health and Safety Act (as amended).
• No equipment, utensils or agents that could damage buildings, fittings or persons may be used; the SIU may reject such conduct.

• Quotations must be submitted on the bidder's company letterhead.
• All copyright and intellectual property in the work vests in the SIU.
• Goods and services are subject to the SIU's conditions, policies and procedures.
• The bidder must ensure the SIU holds a compliant tax status document, as reflected on the CSD summary report.
• No goods may be delivered or services rendered before an official order is received.
• Vendors are advised to register on the National Treasury Central Supplier Database.
• The bidder certifies the information supplied is correct and accepts the SIU's conditions and procedures.
• Payments are effective within 30 days of receipt of invoice; no pre-payments are made.
• No late responses are considered.
• Successful bidders must deliver the specified goods or services in full by the stipulated date.
• By responding, the bidder accepts the SIU's conditions, which override the bidder's own quotation conditions.
• The SIU may enter into a service level agreement after appointment.
• The SIU may run its own internal tests and analysis on products to confirm quality.
• No equipment, utensils or agents that could damage buildings, fittings or persons may be used.
• Bids must be delivered by the stipulated time to the correct address; late bids are not considered.
• Bids must be submitted on the official forms provided and not re-typed.
• The bid is subject to the PPPFA, the Preferential Procurement Regulations, the General Conditions of Contract and any special conditions.
• The successful bidder must complete and sign SBD 7 (contract form).
• The appointed bidder must sign the SBD documents truthfully and in full.
• A bidder who believes the specification is based on a specific brand must inform the SIU on or before the closing date.

• Quotations must be returned to [email protected].
• A proposal submitted to the SIU becomes its property and will not be returned.
• The service provider must commit to post-support service where and when the SIU requires it.
• Payment is made against deliverables achieved, within 30 days of receipt of invoice.
• CSD tax compliance status must appear on the CSD summary report.
• SIU head office: 74 Water Meyers Street, Rentmeester Building, Meyers Park, First Floor.
• The quote must be valid for 30 days.
• All quotations must be accompanied by CSD registration if not previously submitted.
• Quotations must show a cost breakdown, with VAT-inclusive prices where applicable.
• Every page of the quotation must be signed by the responsible person.
• The SIU may withdraw the quotation at any time, inside or outside the validity period.
• The SIU may invite suppliers to present their proposals before a final decision.

Mandatory requirements

• CSD registration.
• Tax compliance, with CSD Overall Tax Status compliant.
• Confirmation of quoting and delivery in line with the scope of work / terms of reference.
• CV of a Diamond Valuator Expert with at least 10 years' relevant diamond industry experience, knowledge of the 4 Cs, precious metals inspection and Precious Metals Act compliance.
• At least three client reference letters for diamond valuation work.
• Proof of qualifications or certifications relevant to diamond valuation.
• Valid Dealer's Licence under section 32.
• Valid authorised representative licence under section 54 of the Principal Act.
• A proposal addressing all aspects of the scope of work.

Statutory documents

• ID copies of directors, CIPC registration, SARS PIN, B-BBEE certificate or sworn affidavit, and the fully completed and signed RFQ including SBD 4 and SBD 6.1.

The 80/20 preference point system applies, since the estimated value does not exceed R1 000 000 (all taxes included).

• Price: 80 points.
• B-BBEE status level of contributor: 20 points in total (18 for B-BBEE level plus 2 for the specific goal of more than 50% black ownership).
• Only responsive bids — those meeting the eligibility, mandatory and statutory criteria — are scored.
• The SIU awards on best value, weighing the expertise, experience and technical proposal of the organisation and individuals and the organisational capacity behind the project team, rather than lowest price alone.