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Hardystonite
Hardystonite

Thulite
Thulite



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Hardystonite
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Thulite

Hardystonite and Thulite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Resinous, Greasy
Vitreous
1.2 Pleochroism
Not Available
Present
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Handbook of mineralogy (2001)
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
1.5 Refractive Index
1.6721.695
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Orthorhombic
1.8 Birefringence
Not Available0.006-0.018
Achroite
0 0.296
1.9 Clarity
Handbook of mineralogy (2001)
OpaqueHerve Nicolas Lazzarelli

Hardystonite and Thulite Optic Character

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

Hardystonite and Thulite Transparency

Similar to their colors, Hardystonite 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, Hardystonite is Handbook of mineralogy (2001) while Hardystonite is Handbook of mineralogy (2001) in appearance.