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Hematite
Hematite

Natrolite
Natrolite



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Hematite
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Natrolite

Hematite and Natrolite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Silky, Pearly
1.2 Pleochroism
O = brownish red; E = yellowish red
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Transparent, Translucent
1.5 Refractive Index
2.690-3.2201.478-1.493
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
0.2800.012-0.013
Achroite
0 0.296
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent

Hematite and Natrolite Optic Character

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

Similar to their colors, Hematite and Natrolite 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.