Rutile and Bertrandite Optical Properties

Rutile

Bertrandite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Weak to distinct brownish red-green-yellow

none.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

2.609-2.9031.583-1.614

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

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

1.8 Birefringence

0.296Not Available

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Rutile and Bertrandite Optic Character

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

Similar to their colors, Rutile 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, Rutile is Translucent and Transparent while Rutile is Translucent and Transparent in appearance.