听石由许多小结晶的耳石形成。
大理石由石灰岩或白云岩变化而来的一种变质岩，常有不规则的杂质色块，专门用于建筑和雕塑。
A metamorphic rock formed by alteration of limestone or dolomite, often irregularly colored by impurities, and used especially in architecture and sculpture.
在加拿大西部，其中很多是在花岗岩的需求，人造石由舒尔茨聘用艺术家发现，海海绵能产生一个很好的花岗岩般的质感。
In western Canada, where granite is much in demand, the faux rock artist employed by Schultz has found that sea sponges can produce a nice granite-like texture.
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