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Coral
Coral

Ludlamite
Ludlamite



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Coral
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Ludlamite

Coral and Ludlamite Optical Properties

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Optical Properties

Luster

-
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.030.02
0.005 1
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Transparency

Translucent
-

Refractive Index

1.486-1.6581.653-1.693
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.160-0.1720.038-0.044
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Coral and Ludlamite Optic Character

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

Coral and Ludlamite Transparency

Similar to their colors, Coral and Ludlamite 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, Coral is Translucent while Coral is Translucent in appearance.