mineral

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Hardness: 6.5-7 Mohs; Color: Translucent white, gray, tan, or blue-lavender; Luster: Waxy to vitreous; Structure: Microcrystalline (cryptocrystalline); Cleavage: None; Fracture: Conchoidal

Hardness: 6
Color: Translucent white, gray, tan, or blue-lavender
Luster: Waxy to vitreous

Identified June 6, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Translucent white, gray, tan, or blue-lavender; Luster: Waxy to vitreous; Structure: Microcrystalline (cryptocrystalline); Cleavage: None; Fracture: Conchoidal

Formation & geological history

Formed as a chemical precipitate from silica-rich hydrothermal fluids or groundwater within cavities of volcanic or sedimentary rocks, often occuring in geodes or vugs.

Uses & applications

Used primarily for ornamental carvings, jewelry (cabochons), and as metaphysical energy stones or collector specimens.

Geological facts

Chalcedony is a cryptocrystalline form of silica, meaning its crystals are too small to be seen without high magnification. Druzy specifically refers to the tiny glittering crystals that form a crust over the host mineral.

Field identification & locations

Identify by its waxy luster, translucency, and conchoidal fracture. Often found in volcanic areas like Oregon, Brazil, or India. Look for botryoidal (grape-like) habits in cavity linings.