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Tourmaline
Tourmaline

Topaz
Topaz



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Tourmaline
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Topaz

Tourmaline and Topaz Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
typically moderate to strong
Weak
1.3 Dispersion
Albite Optical ..
0.02
Rank: 22 (Overall)
0.01
Rank: 26 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent, Translucent, Transparent to opaque
Transparent
1.5 Refractive Index
1.614-1.666
1.606-1.644
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
0.014-0.040
0.008-0.011
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Tourmaline and Topaz Optic Character

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

Tourmaline and Topaz Transparency

Similar to their colors, Tourmaline 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, Tourmaline is Translucent, Transparent and Transparent to opaque while Tourmaline is Translucent, Transparent and Transparent to opaque in appearance.