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Bastnasite
Bastnasite

Hematite
Hematite



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Bastnasite
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Hematite

Bastnasite and Hematite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy, Pearly
Not Available
1.2 Pleochroism
Faint
O = brownish red; E = yellowish red
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
1.5 Refractive Index
1.717-1.7222.690-3.220
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
0.1000.280
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Bastnasite and Hematite Optic Character

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

Similar to their colors, Bastnasite and Hematite 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.