Crocoite and Lapis lazuli Optical Properties

Crocoite

Lapis lazuli

Add ⊕

1 Optical Properties

1.1 Luster

Adamantine

Vitreous, Greasy

1.2 Pleochroism

Distinctly trichroic

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Transparent

Opaque

1.5 Refractive Index

2.31-2.661.500-1.670

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

Trigonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Gemstones of the world (2001)

Crocoite and Lapis lazuli Optic Character

Crocoite and Lapis lazuli optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Crocoite and Lapis lazuli 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 Crocoite and Lapis lazuli 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 Red Gemstones

Crocoite Vs Fire Opal

Crocoite Vs Elbaite

Crocoite Vs Fluorite

Crocoite and Lapis lazuli Transparency

Similar to their colors, Crocoite and Lapis lazuli 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, Crocoite is Transparent while Crocoite is Transparent in appearance.