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Bastnasite
Bastnasite

Pectolite
Pectolite



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Bastnasite
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Pectolite

Bastnasite and Pectolite Optical Properties

Optical Properties

Luster

Vitreous, Greasy, Pearly
Silky

Pleochroism

Faint
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.717-1.7221.595-1.645
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Triclinic

Birefringence

0.1000.028-0.038
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Bastnasite and Pectolite Optic Character

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

Bastnasite and Pectolite Transparency

Similar to their colors, Bastnasite and Pectolite 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, Bastnasite is while Bastnasite is in appearance.