Quartz and Bastnasite Optical Properties

Quartz

Bastnasite

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Optical Properties

Luster

Vitreous

Vitreous, Greasy, Pearly

Pleochroism

None

Faint

Dispersion

0.010.02

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

Refractive Index

1.544-1.5531.717-1.722

1 3.25

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Optic Character

Crystal System

Trigonal

Hexagonal

Birefringence

0.0090.100

0 0.296

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Clarity

Opaque

TransparentUlrich Henn and Claudio C. Milisenda

Quartz and Bastnasite Optic Character

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

Similar to their colors, Quartz and Bastnasite 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.