mineral

Drupa Quartz (Sparkly Drusy Quartz on Matrix)

Crystalline Silicon Dioxide (SiO2) on host rock

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: Clear to white crystals on a brown/tan muddy matrix; Luster: Vitreous to sparkling; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal.

Hardness: 7 (Mohs scale)
Color: Clear to white crystals on a brown/tan muddy matrix
Luster: Vitreous to sparkling

Identified May 8, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Clear to white crystals on a brown/tan muddy matrix; Luster: Vitreous to sparkling; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal.

Formation & geological history

Formed in voids, geodes, or fractures by the precipitation of silica from groundwater or hydrothermal fluids. The brown material is likely secondary clay or iron-oxide rich sediment.

Uses & applications

Used primarily for ornamental purposes, lapidary work, decorative display, and metaphysical collecting. Small sparkly pieces are often used in jewelry.

Geological facts

Drusy (or druzy) refers to the tiny crystals that form on the surface of another mineral or host rock, creating a sugar-like sparkle. These crystals are slow-growing and require stable chemical conditions over thousands of years.

Field identification & locations

Identify by the distinct sparkling 'sugar' coating of tiny crystals that scratch glass. Found commonly in limestone cavities or volcanic gas bubbles. Collectors should look for clean, undamaged crystals with high luster.