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Dumortierite
Dumortierite

Chrysoprase
Chrysoprase



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Dumortierite
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Chrysoprase

Dumortierite and Chrysoprase Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Vitreous, Waxy
1.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
AbsentWalter Schumann
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
None
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent, Translucent to opaque
Translucent, Translucent, Opaque, Translucent to nearly opaque
1.5 Refractive Index
1.669-1.723
1.530-1.543
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal
1.8 Birefringence
0.011-0.037
0.004
1.9 Clarity
Translucent
Translucent

Dumortierite and Chrysoprase Optic Character

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

Similar to their colors, Dumortierite and Chrysoprase 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.