Rosasite and Cassiterite Optical Properties

Rosasite

Cassiterite

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1 Optical Properties

1.1 Luster

Silky, Vitreous

Adamantine, Greasy

1.2 Pleochroism

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

Pleochroic haloes have been observed. Dichroic in yellow

1.3 Dispersion

NA0.07

0.007 1

1.4 Transparency

Not Available

Transparent, Translucent

1.5 Refractive Index

1.672-1.6881.990-2.105

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

tetragonal

1.8 Birefringence

0.139-0.1430.096-0.098

0 0.296

1.9 Clarity

Not Available

Transparent

Rosasite and Cassiterite Optic Character

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

Similar to their colors, Rosasite and Cassiterite 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, Rosasite is Not Available while Rosasite is Not Available in appearance.