Demantoid and Erythrite Optical Properties

Demantoid

Erythrite

Add ⊕

1 Optical Properties

1.1 Luster

Adamantine

Subadamantine, Pearly

1.2 Pleochroism

None

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Not Available

1.5 Refractive Index

1.880-1.8901.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

monoclinic

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Not Available

Demantoid and Erythrite Optic Character

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

Compare Green Gemstones

Demantoid Vs Emerald

Demantoid Vs Euclase

Demantoid Vs Faustite

Demantoid and Erythrite Transparency

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