When you insure a piece of jewellery, your insurer needs to know: if this piece were lost or stolen, what would it cost to replace it?
That is the question an insurance valuation answers. Not what the piece would sell for. Not what a buyer would offer. But what it would cost — at a retail jeweller, today — to recreate or replace it from scratch.
That calculation includes:
The current retail price of the metal (gold, platinum, silver) at today's market rates
The retail replacement cost of any diamonds or gemstones, graded to the same or equivalent specifications
The cost of manufacture — labour, craftsmanship, setting
The jeweller's retail margin
Every one of those components is priced at retail. That is entirely appropriate for an insurance document. If your ring is lost, you deserve to be able to replace it at full retail value. That's the whole point.
But notice what this figure has nothing to do with: the secondary market. The price a buyer pays for a second-hand piece is not determined by what it would cost to make the same piece new. It is determined by supply, demand, condition, and what buyers in the real market are willing to pay for a used item right now.
Think of it this way. If you bought a new car for $45,000 and drove it out of the showroom, its insurance replacement value would reflect what it would cost to replace it with a new equivalent model — perhaps $47,000 by now, accounting for price increases. But if you tried to sell that same car privately a year later, you might receive $34,000.
Is the buyer offering $34,000 being dishonest? No. The car is second-hand. The new-car price and the second-hand price are answers to two different questions. Nobody would walk into a used car yard, hand over an insurance certificate, and expect to be paid the new-vehicle replacement cost.
Jewellery works exactly the same way. The gap between an insurance valuation and a buy appraisal is not evidence of dishonesty or unfairness. It is simply the difference between a retail replacement cost and a real-world secondary market price.
The gap between insurance value and secondary market value tends to be more pronounced with jewellery than with most other assets. There are a few reasons for this.
Retail margin in jewellery is substantial.
The difference between what a jeweller pays for a stone or a piece of finished jewellery at wholesale, and what they sell it for at retail, is significant. When an insurance valuation reflects full retail replacement cost — including that margin — and a buyer is pricing at wholesale plus their own cost of purchasing, the gap is structural.
Diamonds are not a liquid asset.
Contrary to popular belief, diamonds — particularly the round brilliant diamonds set in engagement rings — are not scarce. The secondary market for second-hand diamonds is well supplied. Buyers pay accordingly.
Labour and craftsmanship rarely transfer in value.
The cost of hand-crafting a bespoke piece is reflected in its insurance replacement value. A buyer purchasing the piece second-hand is buying the metal and the stones. They are not paying again for the hours of labour that created it.
Sentiment has no market value.
A piece that meant everything to you — and rightly so — does not command a premium from a buyer who has no connection to its history.
None of this means your piece isn't valuable. It means that value, like every financial concept, is relative to the question being asked.
A buy appraisal starts from a completely different place. Rather than asking what it would cost to replace your piece at retail, it asks: what is this piece worth to a qualified buyer in today's market?
That means looking at the current spot price of the metal, the actual demand for the type and quality of stone, the condition and wearability of the piece, and what comparable items are trading for right now. It produces a number grounded in reality — not retail replacement, not legal theory, but the actual figure you can expect to receive.
At Miller Hirsch, every buy appraisal is provided in writing, with a clear explanation of how each element was assessed. You don't just receive a number. You receive an understanding of where that number comes from — so that when you compare it to your insurance certificate, you can see exactly why they differ, and why both documents are legitimate answers to different questions.
That transparency is not just courtesy. It is the only way to ensure you can make a genuinely informed decision about whether and when to sell.
If you are planning to sell a piece of jewellery and you have an insurance certificate, the most useful thing you can do is set it aside for a moment — not because it isn't valuable information, but because it isn't the right information for this decision.
What you need is a buy appraisal: an honest, expert assessment of what your piece is actually worth on the secondary market today. Once you have that number, you can make a clear-headed decision — knowing exactly what you're receiving, why, and what it means for you.
Book your free buy appraisal with Miller Hirsch today — no obligation, no pressure, and a written explanation of every figure.
Contact Miller Hirsch for a no-obligation, professional valuation. We're here to answer your questions and provide the transparent, respectful service you deserve.

Lonn Miller
Lonn Miller is a second-generation diamond specialist with more than 30 years’ continuous experience across every stage of the global diamond and jewellery supply chain. Having grown up in the trade and worked within a De Beers Sightholder operation, he brings rare, insider understanding of how diamonds are sourced, cut, valued and traded around the world, along with hands-on expertise in diamond grading, gold purity testing and the assessment of designer, antique and vintage pieces.
Known for his transparent, no-pressure approach, Lonn conducts testing in full view of clients and explains valuations clearly to prevent common pricing misconceptions and underselling. With direct experience across major diamond centres on five continents and formal finance training, he combines real-time market insight with rigorous financial analysis to help clients make confident decisions when converting jewellery into cash.

Our mission is to provide a superb, respectful, and transparent experience that delivers relief, satisfaction, consonance, and happiness to every client
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ABN 44 691 903 616
Second Hand Dealers Licence No: 2PS30288
Address
1/795 New South Head Road
Rose Bay NSW 2029
Phone: (02) 9053 6755
Email: [email protected]
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