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hyacinth

A tetragonal mineral, ZrSiO4; occurs widely in granite, granite pegmatite, other felsic igneous rocks, and placers; the chief source of zirconium; a refractory; if cut and polished, the colorless varieties provide exceptionally brilliant gemstones.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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