Same Chain, Two Prices: What That Clasp Stamp Actually Does

Two identical-looking gold chains walk into a pawnshop — one stamped 585 on the clasp, one with no mark at all — and they leave with offers that can differ by 40 percent or more.

The numbers behind the stamps

Those three-digit codes are purity marks, not decoration. 585 means 58.5 percent pure gold — that is 14-karat gold in the European stamping system. 750 means 75 percent pure, which is 18-karat. 916 means 91.6 percent pure, the 22-karat standard common on Indian and Middle Eastern jewelry. The fraction left over is other metals — copper, silver, zinc — that change the color and hardness but not the gold content. Every digit in the stamp translates directly to a gram price.

Path A: the stamped chain

Take a broken gold chain weighing 8 grams with a clear 585 stamp on the clasp barrel. At a spot gold price around $95 CAD per gram for pure gold, the 585 multiplier brings the per-gram value down to roughly $55.65 for that chain's actual gold content. Eight grams times $55.65 lands at about $445 in melt value before any spread. A buyer working from that stamp number knows exactly what they are holding. The negotiation starts from a firm floor, and the seller has leverage because the number is verifiable — a scale and the spot price confirm it in under two minutes.

Path B: the unmarked chain

Now run the same calculation on a chain that looks identical but has no stamp — maybe worn smooth, maybe never marked, maybe imported through a channel that skips hallmarking. Path B starts with uncertainty. Without a purity stamp, the buyer cannot assume 585. They may acid-test it, which gives a rough range but not a precise number. An acid test showing a reaction consistent with 14-karat gold is not the same confidence signal as a clear stamp. The offer reflects that gap. Where Path A earned an offer based on 58.5 percent purity, Path B might be offered on 50 percent or even 41.7 percent — the next lower karat tier — as a hedge against the unknown. On an 8-gram chain, that hedge costs the seller between $35 and $75 depending on how cautious the buyer runs the number.

When the stamp is on the clasp, not the chain

Here is the part most people miss: the stamp does not have to be on the main body of the piece to count. Clasps, jump rings, and end caps are often the only place a hallmark appears, especially on older European chains. A-1 Trade & Loan on Commercial Drive handles pieces like this regularly — a chain with a worn surface and a crisp 750 stamp hidden inside the clasp barrel is still an 18-karat chain. The clasp stamp is legally and practically the purity declaration for the whole piece, assuming the clasp and chain are original to each other. Mismatched metals — a 750 clasp on a chain that acid-tests at 14-karat — are a different problem, but they are rare and usually obvious under a loupe.

When each path wins

Path A, the stamped piece, wins on speed and final offer. There is no ambiguity to price around. Path B, the unmarked piece, can still get a fair offer, but the seller absorbs the cost of uncertainty. The gap between the two offers is not about distrust — it is about the difference between a known multiplier and a tested estimate. A precise stamp is worth real dollars because it removes a step and a risk from the calculation.

916 versus 750 versus 585: the actual spread

At $95 CAD per gram spot, a 916-stamped piece earns roughly $87 per gram in melt value. A 750 piece earns about $71. A 585 piece earns about $56. On a 10-gram piece — a decent-weight pendant or a short chain — that spread between 916 and 585 is $310 in melt value alone. The stamp is not a technicality. It is the single variable that moves the offer more than condition, style, or age.

Before you bring in any gold piece, weigh it on a kitchen scale, find the stamp — check inside the clasp barrel and along the end fittings, not just the chain surface — and multiply the grams by today's spot price at kitco.com using the correct purity fraction. You will walk in knowing what floor to expect, and that number gives you something real to negotiate from.