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The relationship between gemstones and their formation environments
寶石與形成環境的關係
* 圖說:
				蛋白石
* 圖說: 蛋白石
Gemstone formations from igneous rocks

Igneous rocks are rocks formed from the cooling and solidification of the magma deep within the Earth's crust. In general, the longer and slower magma cools, the larger the resulting crystal ..........

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Gemstone formations from sedimentary rocks

Sedimentary rocks are formed from the accumulation, compaction and solidification of sediments from the weathering and erosion of rocks. Gemstones formed in sedimentary rocks are often secondary ..........

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Gemstone formations from metamorphic rocks
Rocks that have undergone internal structural or mineral changes as a result of external factors such as temperature, pressure or chemical environments are called metamorphic rocks. Some gemstones ..........
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