These are 5 pieces of beautiful, square-facet, purple/blue, natural African Iolite gemstones. They weigh 0.15cts (0.75cts total weight) and measure 3mm across each.
Below are the technical details:
Size:
5 pieces of 3 mm
Shape:
Square-Facet
Colour:
Purple/Blue
Clarity:
Clean
Lustre:
Dazzling
Origin:
Africa
Hardness:
7 - 7.5
Specific Gravity:
2.3
Refractive Index:
1.52 - 1.57
Chemical Composition:
Mg2Al4Si5O18, Magnesium Aluminum Silicate
Crystal Structure:
Orthorhombic