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Linarite and Astrophyllite Optical Properties


Astrophyllite and Linarite Optical Properties


Optical Properties

Luster
Sub-Adamantine, Vitreous   
Greasy, Pearly   

Pleochroism
X = pale blue; Y = blue; Z = Prussian blue   
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Translucent   

Refractive Index
1.809-1.859   
1.678-1.758   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Triclinic   

Birefringence
0.050   
0.050   

Clarity
Transparent   
Translucent   

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Linarite and Astrophyllite Optic Character

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

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Linarite and Astrophyllite Transparency

Similar to their colors, Linarite and Astrophyllite 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, Linarite is Transparent while Linarite is Transparent in appearance.

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