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Willemite
Willemite

Actinolite
Actinolite



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Willemite
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Actinolite

Willemite and Actinolite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

-
moderate

Dispersion

0.170.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Refractive Index

1.687-1.7231.613-1.628
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.028-0.0300.0250-0.0270
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Willemite and Actinolite Optic Character

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

Willemite and Actinolite Transparency

Similar to their colors, Willemite and Actinolite 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, Willemite is Transparent and Translucent while Willemite is Transparent and Translucent in appearance.