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Hematite
Hematite

Coral
Coral



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Hematite
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Coral

Hematite and Coral Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
O = brownish red; E = yellowish red
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Translucent
1.5 Refractive Index
2.690-3.2201.486-1.658
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Trigonal
1.8 Birefringence
0.2800.160-0.172
Achroite
0 0.296
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
Translucent

Hematite and Coral Optic Character

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

Hematite and Coral Transparency

Similar to their colors, Hematite and Coral 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.