Orange Quartz SiO2 - 4.DA.05 (Strunz)(from Chile) This is a fine specimen of quartz orange color.
Orange Quartz SiO2 - 4.DA.05 (Strunz)(from Chile) This is a fine specimen of quartz orange color. The color of this specimen is because impurities in its crystal structure, is translucent and very tough. -- source link
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