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Amethyst
Amethyst

Corundum
Corundum



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Amethyst
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Corundum

Amethyst and Corundum Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Adamantine, Vitreous
1.2 Pleochroism
None
None
1.3 Dispersion
0.010.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to translucent
Transparent, Translucent
1.5 Refractive Index
1.544-1.5531.758-1.780
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Trigonal
1.8 Birefringence
0.0090.007-0.010
Achroite
0 0.296
1.9 Clarity
Transparent
Gemmological Tables (2004) More from other references

Amethyst and Corundum Optic Character

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

Amethyst and Corundum Transparency

Similar to their colors, Amethyst and Corundum 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, Amethyst is Transparent and Transparent to translucent while Amethyst is Transparent and Transparent to translucent in appearance.