mineral
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
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 More mineral →
Explore Druzy Quartz Geode (with Chalcedony) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
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.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous