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Carnelian
Carnelian

Howlite
Howlite



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Carnelian
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Howlite

Carnelian and Howlite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
NilArthur Thomas
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Transparent to nearly opaque
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.535-1.5391.583-1.608
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
monoclinic
1.8 Birefringence
0.003-0.0090.019
Achroite
0 0.296
1.9 Clarity
Translucent
Gemmological Tables (2004) More from other references

Carnelian and Howlite Optic Character

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

Carnelian and Howlite Transparency

Similar to their colors, Carnelian 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, Carnelian is Translucent and Transparent to nearly opaque while Carnelian is Translucent and Transparent to nearly opaque in appearance.