mineral

Quartz crystal cluster (possibly smoky quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

AI-generated identification · may be incorrect

Appears to be a cluster of translucent gray-to-brown quartz crystals with vitreous luster and pointed terminations. Quartz has Mohs hardness 7, no cleavage, and specific gravity about 2.65; blue areas may be surface coating or another mineral, so the image alone cannot confirm them.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystals typically grow as silica-rich fluids cool in fractures or cavities; their age depends on the host deposit and cannot be determined from the image.

Uses & applications

Collected as a display specimen; quartz is also used in glassmaking, electronics, and jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms six-sided crystals.

Field identification & locations

Look for glassy luster, pointed hexagonal prisms, and hardness sufficient to scratch ordinary glass. Quartz occurs worldwide in veins, pegmatites, and geodes; verify whether the vivid blue patches are natural before valuing it.