mineral

White Chalcedony

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on the Mohs scale, Color: White to translucent gray, Luster: Waxy to vitreous, Crystal Structure: Trigonal (microcrystalline quartz), Cleavage: None, Specific Gravity: 2.58-2.62

Hardness: 6

Identified July 31, 2026More mineral →

Explore White Chalcedony in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5-7 on the Mohs scale, Color: White to translucent gray, Luster: Waxy to vitreous, Crystal Structure: Trigonal (microcrystalline quartz), Cleavage: None, Specific Gravity: 2.58-2.62

Formation & geological history

Forms in low-temperature hydrothermal veins, volcanic cavities, and sedimentary environments by the deposition of silica-rich solutions.

Uses & applications

Used in ornamental carvings, tumbling, jewelry, and gemstone collection.

Geological facts

Chalcedony has been used since antiquity to create intaglios, seals, and decorative items due to its durability and smooth finish when polished.

Field identification & locations

Can be identified by its waxy luster, conchoidal fracture, and lack of visible crystal faces without microscopic magnification. Commonly found worldwide.