Primary Stone / Ruby
Gemstone: Ruby
Gemstone Family: Corundum
Gemstone Count: 1
Carat Weight: .40
Gemstone Shape: Pear
Primary Color: red
Color: Red
Treatment: Heated
Country of Origin: Thailand
Composition: Natural
Dimensions: 5.82mm x 4.05mm x 2.17mm
Ruby Gemmological Properties:
Chemical Formula: Al2O3, Aluminium oxide
Crystal Structure: Trigonal, hexagonal prisms or tables, rhombohedrons
Colour: Various reds
Hardness: 9 on the Mohs scale
Refractive Index: 1.762 - 1.778
Density: 3.97 - 4.05
Cleavage: None
Transparency: Transparent to opaque
Double Refraction or Birefringence: -0.008
Lustre: Vitreous to silky
Fluorescence: Strong: carmine red