About Sapphire
A gem variety of corundum, encompassing all colors except red (which is ruby). Blue is most traditional, but it can be pink, yellow, etc. It's a stone of wisdom, mental clarity, and spiritual truth, often used for protection and focus.
Primary Hues
Blue, Pink, Yellow, Green, Purple, Orange, Colorless, Black
Geological & Scientific Details
Sapphire is classified as a oxide mineral mineral which typically crystallizes in the trigonal system. Its chemical formula is Aluminium oxide, Al2O3. Common crystal habits include as crystals, massive and granular.
Key Geological Properties:
- Mineral Category: Oxide mineral
- Chemical Formula: Aluminium oxide, Al2O3
- Crystal System: Trigonal
- Predominant Geological Color: Typically blue, but varies
- Crystal Habit: As crystals, massive and granular
- Twinning: Both growth twins (in various orientations) and polysynthetic glide twinning on the rhombohedron [1011
- Cleavage: Poor
- Luster: Vitreous
- Streak: Colorless
- Diaphaneity: Transparent to nearly opaque