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Gypsum
Gypsum

Obsidian
Obsidian



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Gypsum
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Obsidian

Gypsum and Obsidian Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Silky, Pearly, Waxy
Vitreous
1.2 Pleochroism
None
AbsentWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent, Translucent
1.5 Refractive Index
1.521-1.5311.450-1.550
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Amorphous
1.8 Birefringence
0.010Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Gypsum and Obsidian Optic Character

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

Gypsum and Obsidian Transparency

Similar to their colors, Gypsum and Obsidian 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, Gypsum is Translucent and Transparent while Gypsum is Translucent and Transparent in appearance.