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Gedrite
Gedrite

Dallasite
Dallasite



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Gedrite
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Dallasite

Gedrite and Dallasite Optical Properties

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1 Optical Properties
1.1 Luster
Fibrous, Vitreous
Not Available
1.2 Pleochroism
Weak to moderate
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Not Available
1.5 Refractive Index
1.625-1.7181.540
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 Available0.008-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Gedrite and Dallasite Optic Character

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

Similar to their colors, Gedrite and Dallasite 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.