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Howlite
Howlite

Esperite
Esperite



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Howlite
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Esperite

Howlite and Esperite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
NilArthur Thomas
colorless.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
OpaqueAnthony et al, Opaque, Transparent
1.5 Refractive Index
1.583-1.6081.760-1.774
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
monoclinic
1.8 Birefringence
0.0190.012
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
OpaqueAnthony et al

Howlite and Esperite Optic Character

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

Similar to their colors, Howlite and Esperite 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.