mineral

Druzy Quartz Geode (with Chalcedony)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: White, cream, and lavender/purple; Luster: Vitreous to waxy; Crystal structure: Hexagonal/trigonal; Cleavage: None; Specific gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White, cream, and lavender/purple
Luster: Vitreous to waxy

Identified July 9, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White, cream, and lavender/purple; Luster: Vitreous to waxy; Crystal structure: Hexagonal/trigonal; Cleavage: None; Specific gravity: 2.65

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids precipitate into cavities or vesicles within volcanic or sedimentary rock over millions of years.

Uses & applications

Commonly used as decorative display specimens, in lapidary work for cabochons, and as a popular entry-level item for rock and mineral collectors.

Geological facts

This specimen shows 'druzy' formations, which are carpets of tiny crystals that catch the light like sugar. The lavender tint suggests trace amounts of iron or intentional heat/dye treatments, though natural amethyst-colored geodes are common.

Field identification & locations

Identify in the field by looking for rounded, bumpy 'nodules' that feel lighter than expected due to internal hollows. Found globally, especially in basaltic regions of Brazil, Uruguay, and the Midwestern USA.