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Ludlamite
Ludlamite

Erythrite
Erythrite



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Ludlamite
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Erythrite

Ludlamite and Erythrite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Subadamantine, Pearly
1.2 Pleochroism
NilArthur Thomas
Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Not Available
1.5 Refractive Index
1.653-1.6931.626-1.629
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
monoclinic
1.8 Birefringence
0.038-0.044Not Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Not Available

Ludlamite and Erythrite Optic Character

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

Ludlamite and Erythrite Transparency

Similar to their colors, Ludlamite and Erythrite 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, Ludlamite is Gemmological Tables (2004) More from other references while Ludlamite is Gemmological Tables (2004) More from other references in appearance.