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Forsterite
Forsterite

Goethite
Goethite



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Forsterite
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Goethite

Forsterite and Goethite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

colorless.
VisibleArthur Thomas

Dispersion

0.020.05
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.635-1.6712.26-2.398
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.033-0.0420.138
0 0.296
👆🏻

Clarity

Transparent
-

Forsterite and Goethite Optic Character

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

Similar to their colors, Forsterite and Goethite 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.