Sapphire is considered the king of precious stones for its beauty and rarity and is available in "Africa" and "South America"
Sapphire has several chemical and physical properties, including:
Physical properties
- The group minerals oxides
- The shape is barrel
- The scratching
- colorless
- Withstand heat
- Heat-tolerant / color-free
- Hardness 9
- The color is red
- radiant
- Transparent to opaque
- Vitreous sparkle
- Double refractive shape
- Melting point 2044
Chemical properties
- Refractive index 1.763 / 1.760
- Density 4
- Hexagonal / triple crystal system
- The chemical formula is aluminum oxide
- Not dissolve