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Fire Opal
Fire Opal

Citrine
Citrine



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Fire Opal
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Citrine

Fire Opal and Citrine Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Natural: weak; yellow light yellow.

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.370-1.4701.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.009
0 0.296
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Clarity

Transparent
Transparent

Fire Opal and Citrine Optic Character

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

Similar to their colors, Fire Opal and Citrine 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.