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Biotite
Biotite

Bloodstone
Bloodstone



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Biotite
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Bloodstone

Biotite and Bloodstone Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

Strong
-

Dispersion

-0.01
0.005 1
👆🏻

Transparency

-
Opaque

Refractive Index

1.565-1.6251.54-1.55
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.03-0.07-9999
0 0.296
👆🏻

Clarity

-
Opaque

Biotite and Bloodstone Optic Character

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

Biotite and Bloodstone Transparency

Similar to their colors, Biotite and Bloodstone 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, Biotite is while Biotite is in appearance.