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Actinolite
Actinolite

Dravite
Dravite



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Actinolite
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Dravite

Actinolite and Dravite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

moderate
Very strong: pale yellow colorless

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Refractive Index

1.613-1.6281.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

Birefringence

0.0250-0.02700.014-0.032
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Actinolite and Dravite Optic Character

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

Actinolite and Dravite Transparency

Similar to their colors, Actinolite and Dravite 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, Actinolite is TransparentUlrich Henn and Claudio C. Milisenda while Actinolite is TransparentUlrich Henn and Claudio C. Milisenda in appearance.