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Stichtite
Stichtite

Petalite
Petalite



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Stichtite
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Petalite

Stichtite and Petalite Optical Properties

1 Optical Properties
1.1 Luster
Waxy, Resinous
Vitreous, Pearly
1.2 Pleochroism
Weak
AbsentWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.516-1.5441.502-1.523
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
monoclinic
1.8 Birefringence
0.0260.012-0.016
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Stichtite and Petalite Optic Character

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

Stichtite and Petalite Transparency

Similar to their colors, Stichtite and Petalite 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, Stichtite is Translucent while Stichtite is Translucent in appearance.