Cavansite and Bertrandite Optical Properties

Cavansite

Bertrandite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

Visible: X=Z= colorless Y= blue

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.5421.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

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

1.8 Birefringence

0.009Not Available

0 0.296

1.9 Clarity

Not Available

TransparentAnthony et al

Cavansite and Bertrandite Optic Character

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

Cavansite Vs Lawsonite

Cavansite Vs Plumbogummite

Cavansite Vs Riebeckite

Cavansite and Bertrandite Transparency

Similar to their colors, Cavansite 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, Cavansite is Not Available while Cavansite is Not Available in appearance.