How to price jewelry — metal, stones and making charge, correctly
Price a t-shirt and you have one number: what it cost you, plus your margin. Price a piece of jewelry and you actually have three numbers hiding inside one object — the metal, the stones, and the labour to make it — and they do not move together. A heavier, lower-karat piece can cost less than a lighter, higher-karat one. A ring with a single small stone and a ring with a large centre stone can share the same gold weight and still be nowhere near the same price. If you price jewelry the way you'd price a t-shirt, by guessing at a number or copying a competitor's tag, you will get some pieces badly wrong in both directions.
The good news is that jewelry pricing is not guesswork. It is arithmetic, done the way jewellers have always done it: metal value, plus stone value, plus a making charge, equals the cost of the piece. Here is how each part works.
Step 1: find the metal-only weight
Start with the gross weight of the piece — what it weighs on the scale, stones included. You don't want that number for pricing the metal, because you'd be paying gold prices for the weight of a diamond.
Subtract the weight of the stones to get the net metal weight. Stone weight is measured in carats, and the conversion is fixed: 1 carat = 0.2 grams. So a piece with a gross weight of 5.4 g holding a 0.5-carat stone (0.1 g) has a net metal weight of 5.3 g. For multiple stones, add up their carats first, convert to grams, and subtract the total.
A piece with no stones at all skips this step — gross weight and metal weight are the same number.
Step 2: apply the fineness of the karat
Gold is never sold at 100% purity in jewelry; it's alloyed with other metals for strength and colour, and the karat tells you what fraction is actually gold. This is where a lot of hand-built pricing goes wrong — treating an 18K piece as if it were priced like 24K gold overstates the cost badly.
The standard fineness values are:
- 24K = 1.000 (999 fine, effectively pure)
- 22K = 0.916
- 18K = 0.750
- 14K = 0.585
- 9K = 0.375
These are the standard conversion factors used across the trade, and they don't change — what changes day to day is the spot price of gold itself.
Step 3: calculate the metal value
Metal value = spot price per gram (pure metal) × fineness of the karat × net metal weight.
Say, purely as a worked example, spot gold is $80/g for pure metal (you'll use whatever the real spot price is on the day you price — never treat a fixed number as permanent). For the 18K piece above, net metal weight 5.3 g:
$80 × 0.750 × 5.3 g = $318 in metal value.
Compare that to the same weight in 14K: $80 × 0.585 × 5.3 g = $248.10. Same weight, same spot price, a $70 difference — purely from purity. This is why "price per gram" without a karat attached means almost nothing.
Silver and platinum work the same way with their own fineness figures (925 and 999 for silver, 950 for platinum being the common ones) — same formula, different constants.
Step 4: add the stone value
Stones are priced separately from metal, by carat × price per carat, and price per carat varies enormously by stone type, clarity, colour and cut — a jeweller sets this from their own supplier pricing, not a universal chart. A 0.5-carat stone at $600/carat adds $300 to the piece. A piece with no stones simply adds zero here and moves on.
Add metal value + stone value and you have the materials cost of the piece.
Step 5: add the making charge
The making or labour charge covers the actual work — casting, setting, polishing, finishing — and it's usually the number people forget to charge properly, either baking it vaguely into a "markup" or leaving it out entirely. Set it as a flat fee per piece, a percentage of metal value, or a rate that reflects the actual complexity of the design; whichever method you use, keep it visible as its own line rather than buried in the margin.
Metal value + stone value + making charge = total cost of the piece. Everything else — margin, markup, sale price — is built on top of that one number, so if it's wrong, every price downstream is wrong too.
Step 6: turn cost into a price — and know your margin from your markup
Once you have total cost, you set a sale price to hit a target margin (profit as a percentage of the price) or markup (profit as a percentage of the cost) — and these two are not the same number, even though they get used interchangeably all the time. A 100% markup on a $318 cost gives a $636 price, but that's only a 50% margin, not a 100% one. Mixing the two up is one of the fastest ways to underprice a whole case of jewelry without noticing.
Don't forget buy-back
Retail jewelry usually runs the other direction too: a customer brings in gold to sell or trade in. The same logic applies in reverse — take the item's metal, karat and weight, net out any stones, calculate the real metal value at today's spot, and pay a set percentage of that value as your buy-back rate. Skip the karat step here and you'll either overpay for low-purity gold or lose a customer by underpaying for high-purity gold.
Doing this by hand versus by spreadsheet
None of this arithmetic is hard on paper for a single piece. It gets error-prone fast once you have a case with forty SKUs, a gold price that moves, and stones of different carats and clarities in different pieces — recalculating everything by hand every time spot price shifts is exactly the kind of repetitive, mistake-prone task a spreadsheet should be doing for you. That's the actual job the Gold & Jewelry Business Kit does: you set the karat, gross weight, stone carat and price per carat, and making charge once per piece, and every cost, margin, markup and buy-back value recalculates the moment you update the spot price on one reference cell — for every piece in the case at once, not just the one you're staring at.
A closing thought
Jewelry pricing feels intimidating mostly because it's presented as one number when it's really three — metal, stones, labour — added together. Once you separate them, the arithmetic is ordinary, and the pieces that used to feel like guesswork (why does this ring cost so much more than that one when they look similar) start making obvious sense. Price the metal by its real purity and weight, price the stones by their real carat, charge honestly for the work, and the number at the end will hold up under any customer's questions — because it's built from real inputs, not a feeling.
