Demantoid Garnet and Dumortierite Optical Properties

Demantoid Garnet

Dumortierite

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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

NANone

0.007 1

1.4 Transparency

Not Available

Translucent, Translucent to opaque

1.5 Refractive Index

1.88-1.891.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Orthorhombic

1.8 Birefringence

Not Available0.011-0.037

0 0.296

1.9 Clarity

Color grading system

Translucent

Demantoid Garnet and Dumortierite Optic Character

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

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Demantoid Garnet and Dumortierite Transparency

Similar to their colors, Demantoid Garnet 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, Demantoid Garnet is Not Available while Demantoid Garnet is Not Available in appearance.