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Erythrite
Erythrite

Hureaulite
Hureaulite



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Erythrite
X
Hureaulite

Erythrite and Hureaulite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Subadamantine, Pearly
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
0.03
-
1.626-1.629
-
monoclinic
-9999
-
 
Vitreous, Greasy
Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al
0.02
Transparent
1.647-1.667
-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c
0.012
Transparent

Erythrite and Hureaulite Optic Character

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

Erythrite and Hureaulite Transparency

Similar to their colors, Erythrite and Hureaulite 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, Erythrite is while Erythrite is in appearance.