Imperial Topaz and Bertrandite Optical Properties

Imperial Topaz

Bertrandite

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

none.

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.609-1.6431.583-1.614

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

Not Available

TransparentAnthony et al

Imperial Topaz and Bertrandite Optic Character

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

Imperial Topaz Vs Marble

Imperial Topaz Vs Mimetite

Imperial Topaz Vs Microlite

Imperial Topaz and Bertrandite Transparency

Similar to their colors, Imperial Topaz 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, Imperial Topaz is Transparent while Imperial Topaz is Transparent in appearance.