Apophyllite and Hureaulite Optical Properties

Apophyllite

Hureaulite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous, Greasy

1.2 Pleochroism

Dichroic (colorless)

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Transparent

1.5 Refractive Index

1.530-1.5431.647-1.667

1 3.25

1.6 Optic Character

Uniaxial/-

Not Available

1.7 Crystal System

tetragonal

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

1.8 Birefringence

0.000-0.0030.012

0 0.296

1.9 Clarity

Transparent

Apophyllite and Hureaulite Optic Character

Apophyllite and Hureaulite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.

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Apophyllite and Hureaulite Transparency

Similar to their colors, Apophyllite 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, Apophyllite is Translucent and Transparent while Apophyllite is Translucent and Transparent in appearance.