Demantoid and Hureaulite Optical Properties

Demantoid

Hureaulite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous, Greasy

1.2 Pleochroism

None

Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Transparent

1.5 Refractive Index

1.880-1.8901.647-1.667

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

1.8 Birefringence

Not Available0.012

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Demantoid and Hureaulite Optic Character

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

Similar to their colors, Demantoid and Hureaulite 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.