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Common Opal
Common Opal

Actinolite
Actinolite



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Common Opal
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Actinolite

Common Opal and Actinolite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
moderate

Dispersion

0.010.02
0.005 1
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Transparency

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Refractive Index

1.37-1.521.613-1.628
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

-99990.0250-0.0270
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Common Opal and Actinolite Optic Character

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

Common Opal and Actinolite Transparency

Similar to their colors, Common Opal 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, Common Opal is Translucent while Common Opal is Translucent in appearance.