Selling old gold jewelry in Japan: how buyers actually verify what it's worth

Community note · General information, not investment advice

Gold prices have been high for a while, and it's a common conversation in community groups: someone has an old ring, necklace, or pendant and wants to know if it's actually worth selling — and how to tell if a buyer's offer is fair. Here's what legitimate verification actually looks like.

金価格が高い今、古い指輪やネックレスを売るべきか、買取価格が妥当かという相談をよく見かけます。正規の鑑定方法を知っておくと安心です。

What a fair buyer actually checks

• Hallmarks — legitimate Japanese gold items are often stamped with a purity mark (such as a Japan Mint hallmark) indicating karat/purity.
• Purity testing — a proper gold tester (an electronic device, sometimes referred to by brand names like "AuRACLE") reads the actual purity percentage directly from the metal rather than relying on the stamp alone.
• Specific-gravity testing — weighing the item in air and then in water to calculate density is a classic, low-tech way to catch gold-plated fakes, since pure gold has a very distinct density.
• Weight — the item is weighed precisely in grams, since resale value is calculated per gram at the current market rate.

If someone offers to buy your gold without doing any of this — just eyeballing it and naming a number — that's worth being cautious about. A fair transaction usually involves at least one or two of these checks, done in front of you.

Whether or not gold jewelry is a good place to put your savings is a personal financial decision, and not something we can advise on — but knowing how purity and weight are actually verified is useful information no matter which side of the transaction you're on.