Jisho

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あられいし 霰石
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Noun
1. aragonite​
Wikipedia definition
2. Aragonite​Aragonite is a carbonate mineral, one of the two common, naturally occurring, crystal forms of calcium carbonate, CaCO3. It is formed by biological and physical processes, including precipitation from marine and freshwater environments. Aragonite's crystal lattice differs from that of calcite, resulting in a different crystal shape, an orthorhombic system with acicular crystals. Repeated twinning results in pseudo-hexagonal forms.
Read “Aragonite” on English Wikipedia
Read “アラレ石” on Japanese Wikipedia
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Other forms
アラレ石 【アラレいし】

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