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Howlite
Howlite

Pezzottaite
Pezzottaite



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Howlite
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Pezzottaite

Howlite and Pezzottaite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
NilArthur Thomas
Moderate dichroic
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
1.583-1.6081.598-1.620
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Hexagonal
1.8 Birefringence
0.0190.008-0.011
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Howlite and Pezzottaite Optic Character

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

Similar to their colors, Howlite and Pezzottaite 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.