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Steatite
Steatite

Howlite
Howlite



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Steatite
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Howlite

Steatite and Howlite Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004)
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.539-1.5961.583-1.608
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
monoclinic
1.8 Birefringence
0.046-0.0500.019
Achroite
0 0.296
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
Gemmological Tables (2004) More from other references

Steatite and Howlite Optic Character

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

Steatite and Howlite Transparency

Similar to their colors, Steatite and Howlite 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, Steatite is Gemmological Tables (2004) while Steatite is Gemmological Tables (2004) in appearance.