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Amethyst
Amethyst

Actinolite
Actinolite



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Amethyst
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Actinolite

Amethyst and Actinolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
None
moderate
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to translucent
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.544-1.5531.613-1.628
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
monoclinic
1.8 Birefringence
0.0090.0250-0.0270
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Amethyst and Actinolite Optic Character

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

Amethyst and Actinolite Transparency

Similar to their colors, Amethyst 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, Amethyst is Transparent and Transparent to translucent while Amethyst is Transparent and Transparent to translucent in appearance.