The glass is then etched down to the inner layer leaving the design outline in relief. fine cameo glass was produced by the Romans in the1st century AD.
然后将外层玻璃蚀刻到内层，使设计的轮廓成为浮雕，其精细部分用手工或旋转的刀具雕刻。早在公元1世纪，罗马人已生产出精美的宝石玻璃品。
Fine cameo glass was produced by the Romans in the 1st century AD.
早在公元1世纪，罗马人已生产出精美的宝石玻璃品。
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