Quartz and Howlite Optical Properties

Quartz

Howlite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

None

NilArthur Thomas

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.544-1.5531.583-1.608

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

0.0090.019

0 0.296

1.9 Clarity

Opaque

Gemmological Tables (2004) More from other references

Quartz and Howlite Optic Character

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

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Quartz and Howlite Transparency

Similar to their colors, Quartz 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, Quartz is Transparent, Translucent and Transparent to translucent while Quartz is Transparent, Translucent and Transparent to translucent in appearance.