Fayalite and Purpurite Optical Properties

Fayalite

Purpurite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Resinous

Not Available

1.2 Pleochroism

Faint

StrongArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentAnthony et al, Handbook of mineralogy (2001)

TranslucentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.827-1.8791.85-1.92

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.042-0.0510.070

0 0.296

1.9 Clarity

TransparentAnthony et al

TranslucentWalter Schumann

Fayalite and Purpurite Optic Character

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

Fayalite Vs Garnet

Fayalite Vs Hackmanite

Fayalite Vs Gadolinium Gallium Garnet

Fayalite and Purpurite Transparency

Similar to their colors, Fayalite and Purpurite 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.