mineral

Blue quartz (likely tumbled dyed or coated quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7; vivid blue color with a glassy to waxy luster, translucent edges, and conchoidal fracture. Quartz is trigonal and has no cleavage; the intense even blue suggests artificial dye or surface coating rather than natural coloration.

Identified September 1, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous, hydrothermal, and metamorphic environments over many geological ages; this specimen was likely mechanically tumbled and treated after collection. Natural blue quartz is uncommon and may owe color to inclusions or irradiation.

Uses & applications

Used mainly as a decorative, lapidary, and metaphysical stone; quartz is also important industrially in glass, electronics, and abrasives. This small treated tumbled piece has modest collector value.

Geological facts

Blue quartz can be confused with dyed chalcedony, blue glass, or blue aventurine. A magnifier may reveal color concentrated in fractures or surface pits, characteristic of dye.

Field identification & locations

Common quartz sources include Brazil, Madagascar, the United States, and worldwide hydrothermal veins; blue treated material is sold globally. Scratch testing should be avoided on polished specimens, but glass-scratching hardness and visible internal inclusions support quartz identification.