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Sapphire
Sapphire

Precious Opal
Precious Opal



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Sapphire
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Precious Opal

Sapphire and Precious Opal Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Adamantine, Vitreous, Adamantine
Not Available
1.2 Pleochroism
Strong
AbsentWalter Schumann
1.3 Dispersion
0.02None
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to opaque
Transparent, Translucent
1.5 Refractive Index
1.762-1.7881.370-1.470
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
0.008-0.009Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Sapphire and Precious Opal Optic Character

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

Sapphire and Precious Opal Transparency

Similar to their colors, Sapphire and Precious Opal 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.