Caledonite and Bertrandite Optical Properties

Caledonite

Bertrandite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.818-1.9091.583-1.614

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

0.091Not Available

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Caledonite and Bertrandite Optic Character

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

Caledonite Vs Chrysocolla

Caledonite Vs Coral

Caledonite Vs Common Opal

Caledonite and Bertrandite Transparency

Similar to their colors, Caledonite 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, Caledonite is Transparent while Caledonite is Transparent in appearance.