Ajoite and Bertrandite Optical Properties

Ajoite

Bertrandite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

X: very light bluish green; Y and Z: brilliant bluish green

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.5501.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

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

1.8 Birefringence

0.091Not Available

0 0.296

1.9 Clarity

Not Available

TransparentAnthony et al

Ajoite and Bertrandite Optic Character

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

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