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Ammolite
Ammolite

Bertrandite
Bertrandite



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Ammolite
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Bertrandite

Ammolite and Bertrandite Optical Properties

1 Optical Properties
1.1 Luster
Silky, Vitreous
Vitreous
1.2 Pleochroism
None
none.
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.520-1.670
1.583-1.614
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
1.8 Birefringence
0.135-0.145
Not Available
1.9 Clarity
Not Available
TransparentAnthony et al

Ammolite and Bertrandite Optic Character

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

Ammolite and Bertrandite Transparency

Similar to their colors, Ammolite and Bertrandite 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, Ammolite is Not Available while Ammolite is Not Available in appearance.

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