Product ID: 803804259
Product Name: Iolite
Price : $5.96
Weight: 0.97
Jewelry Size: 6.5 x 5.4 x 4.3 Mm
Shape: Octagon
Color: Violet Blue
Clarity: VVS
Luster: Good
Origin: Madagascar
Treatment: Unheated
Crystal Structure: Orthorhombic
Hardness: 7 - 7.5
Specific Gravity: 2.3
Refractive Index: 1.52 - 1.57
Chemical: Mg2Al4Si5O18, Magnesium Aluminum Silicat