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Hessonite
Hessonite

Thulite
Thulite



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Hessonite
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Thulite

Hessonite and Thulite Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Present
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
1.5 Refractive Index
1.742-1.7481.695
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
Not Available0.006-0.018
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Hessonite and Thulite Optic Character

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

Hessonite and Thulite Transparency

Similar to their colors, Hessonite and Thulite 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, Hessonite is Gemmological Tables (2004) while Hessonite is Gemmological Tables (2004) in appearance.