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Hematite
Hematite

Danburite
Danburite



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Hematite
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Danburite

Hematite and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Greasy
1.2 Pleochroism
O = brownish red; E = yellowish red
Weak: pale yellow yellow
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.02
Rank: 22 (Overall)
Fluorite Optical Properties
1.4 Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
2.690-3.220
1.627-1.639
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
0.280
0.006
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda

Hematite and Danburite Optic Character

Hematite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Hematite and Danburite 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 Hematite and Danburite 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. Danburite has Biaxial/+ character.

Hematite and Danburite Transparency

Similar to their colors, Hematite and Danburite 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, Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli while Hematite is Blue Chart Gem Identification (2010) More from other references and OpaqueHerve Nicolas Lazzarelli in appearance.

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