蛇纹石是一种用来珠宝装饰的深绿色矿物，它形成于俯冲带，当海水渗入到地球上地幔的环境中，形成深度可达200km。
Serpentinite is a dark green mineral used in decoration and jewelry. In nature, it is formed when sea water infiltrates into Earth's upper mantle, at depths that can reach 200 km in subduction zones.
熟料颜色由原来灰白色变为暗灰色（稍有绿色是蛇纹石含镁盐造成的）。
The color of clinker is changed from the original ash gray into dark gray (slightly green is caused by serpentine containing magnesium salt).
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