When purchasing a valuable piece of jewellery, it’s not only the sparkle that matters—it’s also the assurance that your investment is accurately protected. A professional jewellery valuation is essential, particularly when it comes to insuring your treasures. Whether you’re acquiring a modern diamond ring or inheriting a piece of antique jewellery, the right documentation can make all the difference in times of loss or damage.
This article outlines how a proper insurance valuation certificate should be compiled and why partnering with trusted professionals like Prins & Prins is crucial.
What Is an Insurance Valuation Certificate?
A formal insurance valuation certificate is an official document issued by a qualified appraiser, reflecting the replacement value of an item in the event of loss, theft, or damage. This document is typically required by insurers and offers peace of mind to jewellery owners.
For newly purchased pieces, your jeweller should provide a certificate free of charge. If unavailable, at the very least, insist on a detailed invoice indicating the price paid and item description. For antique jewellery or items of uncertain origin, a seasoned gemmologist with industry experience must evaluate the item to ensure accurate and legal certification.
What Must an Insurance Valuation Certificate Contain?
A professional jewellery appraisal involves far more than assigning a number. The following elements are crucial for a reliable and insurable document:
The item’s origin: whether purchased from the valuator, presented by the owner, or being re-evaluated.
A unique reference number and the full date of valuation.
A stated valuation amount (in numbers and words), calculated at retail value plus a 10–15% premium for future price escalation.
A high-resolution photograph of the item.
If applicable, a conflict diamond clause should be included.
A comprehensive description of the item, noting all characteristics that could influence its value.
An exclusion clause explaining that valuation is ultimately a professional opinion, particularly important for gemstone valuation when stones are already set.
Basis of valuation: including the Rand/US Dollar exchange rate, current precious metal prices, and reference to wholesale or retail price lists used.
Printed on an official company letterhead and signed by the evaluator.
The qualifications of the appraiser and confirmation if a lab-grown screener was used.
📌 Important: Any signed valuation certificate, even with exclusions, is legally binding.
How Should Jewellery Be Described?
Accurate, standardised descriptions ensure clarity and universal understanding among professionals, insurers, and clients alike. Key descriptive elements include:
The metal type, caratage (quality), colour, and total weight (inclusive of gemstones).
Whether the piece is handmade or mass-produced.
Noteworthy features such as engraving, surface texture, or unique craftsmanship.
Jewellery hallmarks, such as “Made in Italy,” and brand names, if applicable.
For gemstone details:
Gem identification, total number of stones, total carat weight, shape, and setting style.
Whether the stones are natural or lab-grown.
In the case of diamonds, grading must reflect the 4 Cs: cut, clarity, carat weight, and colour.
If a laboratory certificate exists, the mounted stone should be verified against that certificate. The lab report number must be listed.
💡 Note: If the stone has not been weighed loose, carat weight is estimated using industry formulas.
How Is the Value Calculated?
While the Jewellery Council of South Africa (JCSA) provides valuation guidelines, it does not prescribe standard markups, which often vary between jewellers. At Prins & Prins, we recommend the following valuation methodology:
Diamonds: Based on the Rapaport Price Report, plus 15% VAT and a 10% escalation premium.
Coloured gemstones: Priced using reputable wholesale price lists as a benchmark.
Precious metals: Valued according to production/import costs, with an added markup, 15% VAT, and 10% escalation buffer.
These calculations are not arbitrary; they are grounded in global pricing systems and reflect true replacement cost in the local market.
Advice for Jewellers and Appraisers
Consistency and transparency are vital when handling evaluations, especially for returning clients or inherited pieces. Here’s expert advice:
Develop internal grading systems for coloured gems to ensure consistent outcomes.
Link certificates to the USD/ZAR exchange rate and advise clients to adjust their policies accordingly.
Grade pearls based on size, nacre thickness, lustre, and shape. Identify whether they are freshwater, cultured, or from regions like Japan or China.
Avoid colloquial stone names—use universal gemological terminology.
Retain digital and physical copies of all certificates for at least ten years.
The Cost of a Jewellery Valuation
Given the expertise and time required to perform a professional jewellery valuation, it is appropriate for jewellers to charge a flat rate per item or an hourly rate. Charging a percentage of the item’s value is not recommended, as it may introduce bias.
Trust the Experts in Jewellery Valuation
Since 1982, Prins & Prins has been a cornerstone in South Africa’s fine jewellery industry. With a team of seasoned gemmologists and certified appraisers, we provide trusted, professional jewellery appraisals for all types of gems and heirlooms.
Founder Dr. Petre Prins, author of the Handbook on Gems & Jewellery and the Training Manual for Goldsmiths, ensures the highest standards in every valuation we conduct.
📞 Need a jewellery valuation? Call us on 021 422 1090 or email consultants@prinsandprins.com to book a consultation with Cape Town’s most trusted jewellery experts.
