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Phenakite
Phenakite

Euclase
Euclase



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Phenakite
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Euclase

Phenakite and Euclase Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli
Weak: colorless-(greenish) yellow

Dispersion

0.020.02
0.005 1
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Transparency

-
-

Refractive Index

1.650-1.6951.650-1.677
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

0.0160.019-0.025
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Phenakite and Euclase Optic Character

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

Phenakite and Euclase Transparency

Similar to their colors, Phenakite and Euclase 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, Phenakite is while Phenakite is in appearance.