Agate
Agate is a gemstone with the chemical formula SiO2. It has a Mohs hardness of 7 and vitreous to waxy luster.
Agate properties
| Type | Gemstone |
|---|---|
| Chemical formula | SiO2 |
| Mohs hardness | 7 |
| Luster | Vitreous to waxy |
| Typical colors | Varies widely; commonly found in shades of white, gray, blue, green, yellow, orange, brown, and red |
| Formation | Formed from the deposition of silica in volcanic or metamorphic rocks, often in concentric bands |
| Rarity | 5 / 10 |
Mohs hardness 7 — hard
1 · Talc5 · Apatite10 · Diamond
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