mineral
Blue Aventurine
Quartz (Silicon Dioxide, SiO2) with inclusions
Hardness of 7 on the Mohs scale; blue to grayish-blue color; vitreous to greasy luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale; blue to grayish-blue color; vitreous to greasy luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
Formation & geological history
Forms in metamorphic environments and hydrothermal vein systems where quartz crystallizes alongside microscopic mineral inclusions like dumortierite or blue tourmaline that provide the blue coloration.
Uses & applications
Used primarily in beadwork, jewelry, polished gemstones, carvings, and metaphysical collections.
Geological facts
The blue color in blue aventurine is typically caused by tiny fibrous inclusions of minerals such as dumortierite, distinguishing it from standard green quartz aventurine.
Field identification & locations
Identified by its characteristic blue color combined with a subtle glittering effect (aventurescence) caused by mineral inclusions reflecting light. Found globally in regions with quartz-rich metamorphic rocks, notably India, Brazil, and Russia.
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