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Biotite
Biotite

Amethyst
Amethyst



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Biotite
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Amethyst

Biotite and Amethyst Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Strong
None
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.01
Rank: 27 (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Transparent, Transparent to translucent
1.5 Refractive Index
1.565-1.625
1.544-1.553
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Trigonal
1.8 Birefringence
0.03-0.07
0.009
1.9 Clarity
Not Available
Transparent

Biotite and Amethyst Optic Character

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

Similar to their colors, Biotite and Amethyst 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 Not Available while Biotite is Not Available in appearance.

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