mineral
Tumbled blue quartz (likely dyed quartzite or blue aventurine)
Quartz, silicon dioxide (SiO₂); blue coloration may result from inclusions or dye
AI-generated identification · may be incorrectHardness 7, blue with whitish/cloudy patches, vitreous to waxy luster, granular crystalline structure, no obvious cleavage, specific gravity about 2.65. The rounded, glossy surface indicates tumbling and polishing.
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Physical properties
Hardness 7, blue with whitish/cloudy patches, vitreous to waxy luster, granular crystalline structure, no obvious cleavage, specific gravity about 2.65. The rounded, glossy surface indicates tumbling and polishing.
Formation & geological history
Quartz forms in igneous, metamorphic, and hydrothermal environments; the original material may be quartzite or quartz-rich rock. Geological age is specimen-dependent, and any blue dyeing occurred after extraction.
Uses & applications
Primarily sold as a decorative, lapidary, metaphysical, or inexpensive collecting stone; unsuitable for most jewelry requiring gem-grade clarity. Quartz is also widely used in glass, ceramics, electronics, and construction aggregate.
Geological facts
Natural blue quartz is uncommon; vivid, uniform blue tumbled stones are often dyed quartzite, while blue aventurine contains reflective blue mica inclusions.
Field identification & locations
Look for hardness sufficient to scratch glass, translucent edges, and granular quartz texture; dye may concentrate in cracks or surface pits. Common source regions include Brazil, India, Madagascar, and Africa.
