Rock Identifier
Faceted colorless gemstone, likely quartz or glass imitation (Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections) — gemstone
gemstone

Faceted colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections

AI-generated identification · may be incorrect

Colorless, transparent, and strongly vitreous with numerous faceted surfaces. Quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and specific gravity about 2.65; a glass imitation is softer (about 5–6) and usually contains bubbles or flow features.

Identified More gemstone
Explore Faceted colorless gemstone, likely quartz or glass imitation in the encyclopedia →

Identify your own rocks.

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

Physical properties

Colorless, transparent, and strongly vitreous with numerous faceted surfaces. Quartz has Mohs hardness 7, hexagonal crystal structure, no cleavage, and specific gravity about 2.65; a glass imitation is softer (about 5–6) and usually contains bubbles or flow features.

Formation & geological history

Natural quartz forms in hydrothermal veins and igneous cavities, commonly from Paleozoic to younger geological settings; faceting is human processing. If synthetic or glass, it is manufactured rather than geologically formed.

Uses & applications

Faceted quartz is used in inexpensive jewelry and ornamental pieces; gem-quality quartz is collectible but common. Glass imitations have primarily decorative value.

Geological facts

The bright starburst may result from a brilliant-cut gemstone photographed with direct flash, not necessarily from natural crystal faces. Quartz is piezoelectric and widely used in oscillators and electronics.

Field identification & locations

Check with a loupe for bubbles, inclusions, and facet quality; test hardness cautiously, measure specific gravity, and use refractive index testing for reliable identification. Common sources include Brazil, Madagascar, the United States, and worldwide quartz veins.