Clinochlore and Proustite Optical Properties

Clinochlore

Proustite

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1 Optical Properties

1.1 Luster

Pearly, Greasy

Adamantine

1.2 Pleochroism

Distinct: light yellow-green to light bluE

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references

1.5 Refractive Index

1.571-1.5972.792-3.087

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

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

Trigonal

1.8 Birefringence

Not Available0.295-0.296

0 0.296

1.9 Clarity

Transparent

OpaqueUlrich Henn and Claudio C. Milisenda

Clinochlore and Proustite Optic Character

Clinochlore and Proustite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Clinochlore and Proustite 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 Clinochlore and Proustite 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. Clinochlore has Biaxial/+ character.

Compare Green Gemstones

Clinochlore Vs Dravite

Clinochlore Vs Dioptase

Clinochlore Vs Demantoid

Clinochlore and Proustite Transparency

Similar to their colors, Clinochlore and Proustite 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, Clinochlore is Transparent while Clinochlore is Transparent in appearance.