mineral

Quartz crystal cluster in iron-stained matrix

Quartz (SiO₂), likely a drusy or small-vein crystal coating; exact host rock is unclear from the photo

AI-generated identification · may be incorrect

Visible crystals are translucent to smoky-brown with vitreous luster; surrounding material is pale tan and rusty brown. Quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and specific gravity about 2.65.

Identified September 26, 2026More mineral →

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At a glance

Common name: Quartz crystal cluster in iron-stained matrix
Scientific name: Quartz (SiO₂), likely a drusy or small-vein crystal coating; exact host rock is unclear from the photo
Category: mineral
Identified: September 26, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 USD for a common, modest specimen; larger or more attractive crystal displays may be worth more.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely formed when silica-rich fluids deposited quartz in a cavity or fracture, with iron oxides staining the crystals and matrix. The image alone cannot establish its geological age.

Uses & applications

Commonly collected as a mineral specimen; quartz is also widely used in glass, electronics, abrasives, and construction materials.

Geological facts

Quartz is one of Earth’s most abundant minerals and breaks with a curved, conchoidal fracture rather than along cleavage planes.

Field identification & locations

Look for glassy, hard crystals that can scratch ordinary glass, plus the characteristic lack of cleavage. Quartz is geologically plausible in the Horn of Africa, including parts of Ethiopia and Somalia, but the coarse location is not enough to confirm provenance.