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Steatite
Steatite

Dumortierite
Dumortierite



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Steatite
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Dumortierite

Steatite and Dumortierite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
None
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Gemmological Tables (2004)
Translucent, Translucent to opaque
1.5 Refractive Index
1.539-1.596
1.669-1.723
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.046-0.050
0.011-0.037
1.9 Clarity
OpaqueUlrich Henn and Claudio C. Milisenda
Translucent

Steatite and Dumortierite Optic Character

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

Steatite and Dumortierite Transparency

Similar to their colors, Steatite and Dumortierite 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, Steatite is Gemmological Tables (2004) while Steatite is Gemmological Tables (2004) in appearance.