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Forsterite
Forsterite

Dioptase
Dioptase



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Forsterite
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Dioptase

Forsterite and Dioptase Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

colorless.
Weak; dark emerald green

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent
TranslucentHerve Nicolas Lazzarelli

Refractive Index

1.635-1.6711.644-1.720
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.033-0.0420.051-0.053
0 0.296
👆🏻

Clarity

Transparent
TranslucentHerve Nicolas Lazzarelli

Forsterite and Dioptase Optic Character

Forsterite and Dioptase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Forsterite and Dioptase Physical Properties 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 Dioptase 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 Dioptase Transparency

Similar to their colors, Forsterite and Dioptase 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 Transparent while Forsterite is Transparent in appearance.