Fayalite and Clinochlore Optical Properties

Fayalite

Clinochlore

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Pearly, Greasy

1.2 Pleochroism

Faint

Distinct: light yellow-green to light bluE

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentAnthony et al, Handbook of mineralogy (2001)

Transparent

1.5 Refractive Index

1.827-1.8791.571-1.597

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Orthorhombic

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

1.8 Birefringence

0.042-0.051Not Available

0 0.296

1.9 Clarity

TransparentAnthony et al

Transparent

Fayalite and Clinochlore Optic Character

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

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Fayalite and Clinochlore Transparency

Similar to their colors, Fayalite and Clinochlore 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, Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al while Fayalite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.