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