Linarite and Spinel Optical Properties

Linarite

Spinel

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1 Optical Properties

1.1 Luster

Sub-Adamantine, Vitreous

Vitreous

1.2 Pleochroism

X = pale blue; Y = blue; Z = Prussian blue

Absent

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Transparent

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.809-1.8591.73

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Isometric

1.8 Birefringence

0.050Not Available

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Linarite and Spinel Optic Character

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

Similar to their colors, Linarite and Spinel 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, Linarite is Transparent while Linarite is Transparent in appearance.