sedimentary
Dragon Egg Agate
Agate (Silicon Dioxide, SiO2)
Hardness: 6.5-7 (Mohs); Color: Translucent gray-lilac with brown bands; Luster: Waxy to vitreous; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Pattern: Snakeskin or crackled texture.
- Hardness
- 6
- Color
- Translucent gray-lilac with brown bands
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Translucent gray-lilac with brown bands; Luster: Waxy to vitreous; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Pattern: Snakeskin or crackled texture.
Formation & geological history
Formed through the deposition of silica from groundwater in the cavities of igneous rocks or sedimentary formations over millions of years. This specific 'weathered' or 'crackled' texture is often enhanced through tumbling or heat treatment.
Uses & applications
Used primarily in decorative applications, jewelry such as pendants or rings, and as a popular palm stone for crystal collectors.
Geological facts
The name 'Dragon Egg' is a trade name for agates that have been tumbled and often treated to emphasize a distinct 'skin' or crackled outer layer that resembles an egg.
Field identification & locations
Identify by its translucency when held to light and its distinctive waxy feel. It is commonly found in Brazil, India, and parts of the USA. Collectors look for unique banding and surface 'scaling' patterns.
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