mineral

Quartz (Milky/Sugar variety)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to translucent yellowish; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to translucent yellowish
Luster: Vitreous to greasy

Identified June 2, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent yellowish; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Forms in a wide variety of environments including igneous (granitic pegmatites), metamorphic, and sedimentary rocks. It crystallizes from silica-rich hydrothermal fluids or cooling magma.

Uses & applications

Used in glassmaking, abrasives, silicon production for electronics, and as a semi-precious stone in jewelry or as a collective specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. This specific specimen appears to be a small aggregate or 'sugary' quartz fragment, common in many geological settings.

Field identification & locations

Identify by its hardness (it scratches glass), lack of cleavage, and glassy luster. Found globally in riverbeds, mountains, and desert sands. Collectors should look for defined crystal faces for higher value.