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Peridot
Peridot

Topaz
Topaz



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Peridot
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Topaz

Peridot and Topaz Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Greasy
Vitreous
1.2 Pleochroism
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
Weak
1.3 Dispersion
0.020.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Transparent
1.5 Refractive Index
1.64-1.691.606-1.644
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.0360.008-0.011
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Peridot and Topaz Optic Character

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

Peridot and Topaz Transparency

Similar to their colors, Peridot and Topaz 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, Peridot is Transparent while Peridot is Transparent in appearance.