mineral

Likely colorless topaz

Topaz, Al₂SiO₄(F,OH)₂

AI-generated identification · may be incorrect

Transparent to translucent, colorless with strong glassy luster and blocky cleavage surfaces; topaz has Mohs hardness 8, orthorhombic crystals, perfect basal cleavage, and specific gravity about 3.4–3.6. The photo alone cannot confirm the identification; quartz or another clear mineral is possible.

Identified October 4, 2026More mineral →

Explore Likely colorless topaz in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Topaz crystallizes in silica-rich igneous rocks, especially granitic pegmatites and greisens, and may later occur in stream gravels. The specimen’s age cannot be determined from its appearance.

Uses & applications

Gem-quality topaz is cut for jewelry; clear pieces are also collected. Industrial use is limited because suitable synthetic abrasives are generally cheaper.

Geological facts

Topaz’s perfect cleavage can produce broad, flat break surfaces, so it may fracture readily despite its high scratch hardness.

Field identification & locations

The clear, roughly blocky piece is consistent with topaz but needs testing: hardness, density, and optical examination can distinguish it from quartz, which lacks topaz’s perfect cleavage. The reported location near 15.4°S, 28.4°E is not enough to establish provenance; confirm whether the specimen came from pegmatite or gravel.