mineral
Milky quartz (possible pale green quartz)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectTypically Mohs hardness 7, vitreous to waxy luster, white to translucent or faint green, with no cleavage and conchoidal fracture; hexagonal crystal structure. The image is insufficient to confirm whether the green color is natural or surface staining/coating.
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Physical properties
Typically Mohs hardness 7, vitreous to waxy luster, white to translucent or faint green, with no cleavage and conchoidal fracture; hexagonal crystal structure. The image is insufficient to confirm whether the green color is natural or surface staining/coating.
Formation & geological history
Forms in igneous and hydrothermal veins, pegmatites, and metamorphic rocks as silica-rich fluids cool; quartz is mostly Precambrian to modern in age. Common worldwide.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and decorative objects; attractive translucent pieces may be sold as specimens or cabochons.
Geological facts
Quartz scratches glass and steel but should not be confused with softer calcite, which reacts with dilute acid. Green coloration can indicate inclusions or alteration, but visual identification alone is uncertain.
Field identification & locations
Likely quartz if it scratches glass, shows conchoidal fracture, and lacks cleavage; test carefully with a steel point and inspect under magnification. Common localities include Brazil, Madagascar, the United States, and China.
