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Sugilite
Sugilite

Calcite
Calcite



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Sugilite and Calcite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Pearly
1.2 Pleochroism
Weak
NilArthur Thomas
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
Transparent, Translucent
1.5 Refractive Index
1.607-1.612
1.486-1.658
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
0.003
0.154-0.174
1.9 Clarity
Translucent
Transparent

Sugilite and Calcite Optic Character

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

Sugilite and Calcite Transparency

Similar to their colors, Sugilite and Calcite 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, Sugilite is Translucent while Sugilite is Translucent in appearance.