-40%
1.15 Carats Natural Set of Twelve Blue Iolite Faceted Gemstone 2.5 mm Square
$ 5.67
- Description
- Size Guide
Description
Primary Stone / IoliteGemstone: Iolite
Gemstone Family: Gem
Gemstone Count: 12
Total Carat Weight: 1.15
Gemstone Shape: Square
Primary Color: purple
Color: Purple
Treatment: No Known Treatment
Country of Origin: India
Composition: Natural
Dimensions: 2.50 x 2.50 mm
Iolite gemology
Species: cordierite
Color: Blue, violet, brownish
Chemical composition: Mg2Al4Si5O18 magnesium aluminum silicate
Crystal
system: Orthorhombic, short prisms
Hardness: 7-7.5 (Mohs scale)
Specific gravity: 2.58 - 2.66
Refractive index: 1.542 - 1.578
Birefringence: -0.008 to - 0.012
Optical character:
Color of streak: White
Absorption spectrum: 645,593, 585, 535, 492, 456, 436, 426
Fluorescence: None
View more great items