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Dumortierite
Dumortierite

Periclase
Periclase



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Dumortierite
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Periclase

Dumortierite and Periclase 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
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
1.5 Refractive Index
1.669-1.7231.735-1.738
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
TransparentWalter Schumann

Dumortierite and Periclase Optic Character

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

Similar to their colors, Dumortierite and Periclase 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.