Corundum

Corundum is a crystalline form of aluminum oxide, occurring as colorless or highly colored crystals. It is one of the hardest substances found in nature after diamond and is commonly used in jewelry and abrasive materials.

Corundum
Category: Oxides
Hardness: 9
Specific Gravity: 3.95
Luster: Adamantine to vitreous
Transparency: Transparent to opaque
Crystal System: Trigonal
Cleavage: None
Fracture: Conchoidal to uneven
Composition: Al2O3 (Aluminium oxide)
Typical Size: Crystals can vary vastly in size; typically 1-20 cm but larger specimens are not uncommon.
Found In:
IN India AU Australia MG Madagascar TH Thailand PK Pakistan
Uses:
  • Jewelry
  • Industrial abrasives
  • Optical instruments
  • Watch crystals
  • Electrical insulators
Corundum is known for its grounding and protective properties, often used in spiritual practices to improve focus and clarity. It is said to promote self-confidence and self-discipline, while also enhancing perception and awareness.