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Forsterite
Forsterite

Spodumene
Spodumene



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Forsterite
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Spodumene

Forsterite and Spodumene Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
colorless.
0.02
Transparent
1.635-1.671
-
Orthorhombic
0.033-0.042
Transparent
 
Vitreous
Strong in kunzite: α-purple
0.02
Transparent
1.657-1.681
-
monoclinic
0.014-0.018
-

Forsterite and Spodumene Optic Character

Forsterite and Spodumene optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Forsterite Vs Spodumene like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Forsterite and Spodumene optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Forsterite and Spodumene Transparency

Similar to their colors, Forsterite and Spodumene transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Forsterite is while Forsterite is in appearance.