In ancient, copper was adopted as the major chop material. Carving stone replaced copper to be the major material since Ming Dynasty (about15 th century).

古代印章材料，大都以铜材为主。自明代(5世纪)，石材取代了铜材，成为治印主要材料。

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Creating detailed plans early means carving some decisions into stone.

提早创建详细计划意味着将您的一些决定刻到石头上。

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In this sunken city, the researchers found a stone carving that is thought to be an Atlantean soldier.

VOA: special.2011.04.26

It really is like a puzzle, based on the shape of the rock and any carving on the stone.

BBC: Piecing together puzzles in Cambodia

The hubbub about a calamity occurring comes from a Mayan stone carving called monument 6, made in 700 A.D.

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But the cultural relics police were not so amused when Carey laid down on top of an ancient stone carving.

CNN: 'Drew Carey' visits streets of China