ぎょくずい
玉髄
1. chalcedony
2. ChalcedonyChalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony's standard chemical structure (based on the chemical structure of quartz) is SiO2 (Silicon Dioxide). Chalcedony has a waxy luster, and may be semitransparent or translucent.
Read “Chalcedony” on English Wikipedia
Read “玉髄” on Japanese Wikipedia
Read “Chalcedony” on DBpedia
Read “Chalcedony” on English Wikipedia
Read “玉髄” on Japanese Wikipedia
Read “Chalcedony” on DBpedia
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