Baddeleyite and Bertrandite Optical Properties

Baddeleyite

Bertrandite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

DistinctArthur Thomas

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

2.13-2.201.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/c

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

1.8 Birefringence

0.07Not Available

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Baddeleyite and Bertrandite Optic Character

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

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Baddeleyite and Bertrandite Transparency

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