ジェムケリー　宝石の雑学

■刻印とホールマーク
ジュエリーで使用するに当たり、割金がどれだけしてあるか、純度がどれだけあるかというものを地金に打ってあるもので、 日本では２通りあり、１つはジュエリー製作者が製品の完成後に自分で打刻する刻印で、 もう１つは造幣局が打つ国家検定の刻印です。この造幣局の刻印は1929年（昭和4年）より始まり「ホールマーク」 「造幣局検定マーク」とも呼ばれています。

ジェムケリー

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