×

Ludlamite
Ludlamite

Polyhalite
Polyhalite



ADD
Compare
X
Ludlamite
X
Polyhalite
1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Resinous
1.2 Pleochroism
NilArthur Thomas
Not Available
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
1.653-1.6931.546-1.548
Agate Opal
1 3.25
1.8 Optic Character
Not Available
Not Available
1.9 Crystal System
monoclinic
Triclinic
1.10 Birefringence
0.038-0.0440.021
Achroite
0 0.296
1.14 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Not Available