-40%
.39 Carats Natural Blue Iolite Faceted Gemstone Oval ILT13
$ 3.56
- Description
- Size Guide
Description
Primary Stone / IoliteGemstone: Iolite
Gemstone Family: Gem
Gemstone Count: 1
Carat Weight: 0.39
Gemstone Shape: Oval
Primary Color: purple
Color: Purple
Treatment: No Known Treatment
Country of Origin: India
Composition: Natural
Dimensions: 5.97 x 3.92 x 3.04 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
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