Mohs hardness: 7
Refractive index: 1.544-1.553
Critical angle: 40°
Specific gravity: 2.63-2.65
Fracture: Conchoidal, brittle.
Dispersion: Medium (.013)
Colombian Emerald Facet Grade Rough Natural .50 cts 5x4x3 MM 402F Stones Shown is the stone you will...
Mixed Rough for Tumble 5 to 35 MM 1/2 Pound 742F The stones in the photo are the stones you will receive....
Mixed Rough for Tumble 5 to 40 MM 1/2 Pound 741F The stones in the photo are the stones you will receive....