Primary Stone / Emerald

Gemstone: Emerald

Gemstone Family: Beryl

Gemstone Count: 1

Carat Weight: 0.225

Gemstone Shape: Pear

Primary Color: green

Color: Green

Treatment: Oiling

Country of Origin: Colombia

Composition: Natural

Dimensions: 5.54mm x 3.10mm x 1.94mm

Emerald Gemological Properties:

Species: Emerald - beryl

Chemical Formula: Al2Be3Si6O18 - Aluminum beryllium silicate

Crystal Structure: Hexagonal; hexagonal prisms

Color: Emerald green to green to slightly bluish or yellowish-green

Hardness: 7.5 to 8 on the Mohs scale

Refractive Index: 1.565 to 1.602

Density: 2.67 to 2.78

Cleavage: Indistinct 

Transparency: Transparent to opaque

Double Refraction or Birefringence: -0.006

Luster: Vitreous

Fluorescence: Usually none