Tortoiseshell and Dioptase Optical Properties

Tortoiseshell

Dioptase

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Weak; dark emerald green

1.3 Dispersion

NA0.04

0.007 1

1.4 Transparency

Gemmological Tables (2004)

TranslucentHerve Nicolas Lazzarelli

1.5 Refractive Index

1.540-1.5601.644-1.720

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

Not Available0.051-0.053

0 0.296

1.9 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

TranslucentHerve Nicolas Lazzarelli

Tortoiseshell and Dioptase Optic Character

Tortoiseshell and Dioptase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Tortoiseshell and Dioptase 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 Tortoiseshell and Dioptase 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 Blue Gemstones

Tortoiseshell Vs Watermelon Tourmaline

Tortoiseshell Vs Wardite

Tortoiseshell Vs White Opal

Tortoiseshell and Dioptase Transparency

Similar to their colors, Tortoiseshell and Dioptase 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, Tortoiseshell is Gemmological Tables (2004) while Tortoiseshell is Gemmological Tables (2004) in appearance.