Fibrolite and Bertrandite Optical Properties

Fibrolite

Bertrandite

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

DistinctArthur Thomas

none.

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.658-1.6781.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Fibrolite and Bertrandite Optic Character

Fibrolite and Bertrandite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Fibrolite and Bertrandite 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 Fibrolite and Bertrandite 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 Green Gemstones

Fibrolite Vs Glass

Fibrolite Vs Grandidierite

Fibrolite Vs Gaspite

Fibrolite and Bertrandite Transparency

Similar to their colors, Fibrolite and Bertrandite 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, Fibrolite is Transparent while Fibrolite is Transparent in appearance.