mineral
Blue Quartz (Blue Aventurine)
Silicon Dioxide with inclusions (SiO2)
Hardness of 7 on the Mohs scale, vitreous to dull luster, hexagonal crystal system, distinct grainy texture due to inclusions, bright denim-to-indigo blue color.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to dull luster, hexagonal crystal system, distinct grainy texture due to inclusions, bright denim-to-indigo blue color.
Formation & geological history
Forms in metamorphic or magmatic environments where quartz crystallizes along with blue mineral inclusions like dumortierite, magnesioriebeckite, or crocidolite.
Uses & applications
Popularly used as a tumbled decorative stone, in lapidary work, jewelry beads, and metaphysical crystal collecting.
Geological facts
The distinct blue hue in natural blue quartz is typically caused by minute microscopic fibrous inclusions of dumortierite or tourmaline rather than elemental impurities in the quartz structure itself.
Field identification & locations
Can be identified in the field by its scratch resistance (harder than steel), quartz-like toughness, and lack of cleavage. Commonly found in Brazil, India, Russia, and South Africa.
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