Holmquistite and Augite Optical Properties

Holmquistite

Augite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Resinous

1.2 Pleochroism

Strong in shades of violet when dark-colored.Anthony et al

Pale green

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Transparent, Translucent

1.5 Refractive Index

1.622-1.6661.671-1.774

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

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

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Holmquistite and Augite Optic Character

Holmquistite and Augite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Holmquistite and Augite 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 Holmquistite and Augite 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 Black Gemstones

Holmquistite Vs Melanite

Holmquistite Vs Magnetite

Holmquistite Vs Morion

Holmquistite and Augite Transparency

Similar to their colors, Holmquistite and Augite 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, Holmquistite is Transparent while Holmquistite is Transparent in appearance.