Botryoidal Chalcedony Druzy Quartz Mineral Specimen
Botryoidal Chalcedony Druzy Quartz Mineral Specimen
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite which 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).
A botryoidal texture, also known as mamillary or reniform texture, is one in which the mineral has an external form composed of rounded segments.
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