sapphire
gem · common
Quick facts
- Formula
- Al2O3
- Hardness
- 9
- Luster
- Vitreous
- Colors
- Blue, yellow, green, pink, etc.
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide with trace elements that give it color.
Known for its hardness and vibrant color, often used in jewelry.
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