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Periclase
Periclase

Petalite
Petalite



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Periclase
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Petalite

Periclase and Petalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Pearly
1.2 Pleochroism
Not Available
AbsentWalter Schumann
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.735-1.7381.502-1.523
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Isometric
monoclinic
1.8 Birefringence
Not Available0.012-0.016
Achroite
0 0.296
1.9 Clarity
TransparentWalter Schumann
TransparentUlrich Henn and Claudio C. Milisenda

Periclase and Petalite Optic Character

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

Periclase and Petalite Transparency

Similar to their colors, Periclase 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, Periclase is Gemstones of the world (2001) More from other references and TransparentWalter Schumann while Periclase is Gemstones of the world (2001) More from other references and TransparentWalter Schumann in appearance.