Bowenite and Bertrandite Optical Properties

Bowenite

Bertrandite

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1 Optical Properties

1.1 Luster

Waxy, Silky, Resinous, Greasy

Vitreous

1.2 Pleochroism

Not Available

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.530-1.5751.583-1.614

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

TranslucentHerve Nicolas Lazzarelli

TransparentAnthony et al

Bowenite and Bertrandite Optic Character

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

Similar to their colors, Bowenite 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, Bowenite is Blue Chart Gem Identification (2010) and TranslucentHerve Nicolas Lazzarelli while Bowenite is Blue Chart Gem Identification (2010) and TranslucentHerve Nicolas Lazzarelli in appearance.