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Dumortierite
Dumortierite

Almandine Garnet
Almandine Garnet



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Dumortierite
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Almandine Garnet

Dumortierite and Almandine Garnet Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Not Available
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.669-1.7231.780-1.810
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Isometric
1.8 Birefringence
0.011-0.037Not Available
Achroite
0 0.296
1.9 Clarity
Translucent
Transparent to translucent

Dumortierite and Almandine Garnet Optic Character

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

Dumortierite and Almandine Garnet Transparency

Similar to their colors, Dumortierite and Almandine Garnet 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.