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Fire Opal
Fire Opal

Sunstone
Sunstone



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Fire Opal
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Sunstone

Fire Opal and Sunstone Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak or absentWalter Schumann

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.370-1.4701.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

-
Triclinic

Birefringence

-99990.007-0.010
0 0.296
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Clarity

Transparent
Transparent to translucent

Fire Opal and Sunstone Optic Character

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

Fire Opal and Sunstone Transparency

Similar to their colors, Fire Opal and Sunstone 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, Fire Opal is Transparent and Translucent while Fire Opal is Transparent and Translucent in appearance.