Sphalerite and Rosasite Optical Properties

Sphalerite

Rosasite

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1 Optical Properties

1.1 Luster

Adamantine

Silky, Vitreous

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

0.16NA

0.007 1

1.4 Transparency

Transparent, Translucent

Not Available

1.5 Refractive Index

2.368-2.3711.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

monoclinic

1.8 Birefringence

Not Available0.139-0.143

0 0.296

1.9 Clarity

Transparent

Not Available

Sphalerite and Rosasite Optic Character

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

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