×

Bastnasite
Bastnasite

Ludlamite
Ludlamite



ADD
Compare
X
Bastnasite
X
Ludlamite

Bastnasite and Ludlamite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy, Pearly
Vitreous, Pearly
1.2 Pleochroism
Faint
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.717-1.7221.653-1.693
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
monoclinic
1.8 Birefringence
0.1000.038-0.044
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Bastnasite and Ludlamite Optic Character

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

Bastnasite and Ludlamite Transparency

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