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Friedelite
Friedelite

Corundum
Corundum



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Friedelite
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Corundum

Friedelite and Corundum Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Adamantine, Vitreous
1.2 Pleochroism
NilArthur Thomas
None
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent, Translucent
1.5 Refractive Index
1.627-1.6631.758-1.780
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Trigonal
1.8 Birefringence
0.032-0.0350.007-0.010
Achroite
0 0.296
1.9 Clarity
Translucent
Gemmological Tables (2004) More from other references

Friedelite and Corundum Optic Character

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

Friedelite and Corundum Transparency

Similar to their colors, Friedelite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.