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Gedrite
Gedrite

Black Opal
Black Opal



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Gedrite
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Black Opal

Gedrite and Black Opal Optical Properties

1 Optical Properties
1.1 Luster
Fibrous, Vitreous
Not Available
1.2 Pleochroism
Weak to moderate
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent, Translucent
1.5 Refractive Index
1.625-1.7181.370-1.470
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Not Available
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Gedrite and Black Opal Optic Character

Gedrite and Black Opal optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Gedrite and Black Opal 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 Gedrite and Black Opal 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.

Gedrite and Black Opal Transparency

Similar to their colors, Gedrite and Black Opal 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, Gedrite is Transparent while Gedrite is Transparent in appearance.