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Demantoid
Demantoid

Shigaite
Shigaite



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Demantoid
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Shigaite

Demantoid and Shigaite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Vitreous
1.2 Pleochroism
None
Distinct
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Not Available
1.5 Refractive Index
1.880-1.8901.546
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
cubic
Trigonal
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Not Available

Demantoid and Shigaite Optic Character

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

Demantoid and Shigaite Transparency

Similar to their colors, Demantoid and Shigaite 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, Demantoid is Gemmological Tables (2004) while Demantoid is Gemmological Tables (2004) in appearance.