Mottramite and Rosasite Optical Properties

Mottramite

Rosasite

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1 Optical Properties

1.1 Luster

Greasy

Silky, Vitreous

1.2 Pleochroism

Visible X=Y= canary yellow to greenish yellow

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

1.5 Refractive Index

2.1701.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.1500.139-0.143

0 0.296

1.9 Clarity

Not Available

Mottramite and Rosasite Optic Character

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

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