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Howlite
Howlite

Verdelite
Verdelite



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Howlite
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Verdelite

Howlite and Verdelite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
NilArthur Thomas
Strong: dark green yellow
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
1.5 Refractive Index
1.583-1.6081.614-1.666
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
0.0190.014-0.040
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Howlite and Verdelite Optic Character

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

Howlite and Verdelite Transparency

Similar to their colors, Howlite and Verdelite 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, Howlite is Gemmological Tables (2004) More from other references while Howlite is Gemmological Tables (2004) More from other references in appearance.