Ruby

Ruby is the red variety of corundum and one of the most valuable gemstones. Its red color is due to chromium.

Ruby
Category: Corundum
Hardness: 9
Specific Gravity: 4
Luster: vitreous
Transparency: transparent to translucent
Crystal System: trigonal
Cleavage: none
Fracture: conchoidal to uneven
Composition: Al₂O₃
Typical Size: small to medium
Found In:
IN India
Uses:
  • jewelry
  • collecting
Associated with passion, protection, and vitality.