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Howlite
Howlite

Gedrite
Gedrite



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Howlite
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Gedrite

Howlite and Gedrite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Fibrous, Vitreous
1.2 Pleochroism
NilArthur Thomas
Weak to moderate
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent
1.5 Refractive Index
1.583-1.6081.625-1.718
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
0.019Not Available
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Howlite and Gedrite Optic Character

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

Similar to their colors, Howlite and Gedrite 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.