Opal and Chrysoprase Optical Properties

Opal

Chrysoprase

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous, Vitreous, Waxy

1.2 Pleochroism

None

AbsentWalter Schumann

1.3 Dispersion

Albite Optical ..

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None

Rank: N/A (Overall)▶

None

Rank: N/A (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent, Transparent to translucent

Translucent, Translucent, Opaque, Translucent to nearly opaque

1.5 Refractive Index

1.37-1.52

1.530-1.543

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

1.8 Birefringence

Not Available

0.004

1.9 Clarity

Transparent

Translucent

Opal and Chrysoprase Optic Character

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

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