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Foitite
Foitite

Actinolite
Actinolite



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Actinolite

Foitite and Actinolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Strong: pale lavender dark blueAnthony et al
moderate
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
TranslucentAnthony et al, Translucent
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
1.5 Refractive Index
Not Available
1.613-1.628
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
monoclinic
1.8 Birefringence
Not Available
0.0250-0.0270
1.9 Clarity
TranslucentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Foitite and Actinolite Optic Character

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

Foitite and Actinolite Transparency

Similar to their colors, Foitite 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, Foitite is Translucent and TranslucentAnthony et al while Foitite is Translucent and TranslucentAnthony et al in appearance.