Chalcedony
mineral · common
Quick facts
- Formula
- SiO₂
- Hardness
- 7
- Luster
- Waxy
- Colors
- Variety of colors including blue, green, orange, and gray
Chalcedony is a microcrystalline variety of quartz that comes in many colors and is often used in jewelry.
Look for a waxy luster and smooth texture with a variety of colors.
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