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Mottramite
Mottramite

Staurolite
Staurolite



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Mottramite
X
Staurolite

Mottramite and Staurolite Optical Properties

Optical Properties

Luster

Greasy
Resinous

Pleochroism

Visible X=Y= canary yellow to greenish yellow
X = colorless; Y = pale yellow; Z = golden yellow

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.1701.736-1.762
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.1500.009-0.015
0 0.296
👆🏻

Clarity

-
-

Mottramite and Staurolite Optic Character

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

Mottramite and Staurolite Transparency

Similar to their colors, Mottramite and Staurolite 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, Mottramite is while Mottramite is in appearance.