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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

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
moderate
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.37-1.521.613-1.628
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
monoclinic
1.8 Birefringence
Not Available0.0250-0.0270
Achroite
0 0.296
1.9 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.