Proustite and Sunstone Optical Properties

Proustite

Sunstone

Add ⊕

1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Moderate; cochineal-red to blood-red

Weak or absentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Rarely transparentMore from other references

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

2.792-3.0871.53-1.55

1 3.25

1.8 Optic Character

Not Available

1.10 Crystal System

Trigonal

Triclinic

1.12 Birefringence

0.295-0.2960.007-0.010

0 0.296

1.14 Clarity

OpaqueUlrich Henn and Claudio C. Milisenda

Transparent to translucent

Proustite and Sunstone Optic Character

Proustite and Sunstone optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Proustite and Sunstone 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 Proustite and Sunstone 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 Black Gemstones

Proustite Vs Sheen Obsidian

Proustite Vs Schorlomite

Proustite Vs Serendibite

Proustite and Sunstone Transparency

Similar to their colors, Proustite and Sunstone 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, Proustite is Gemmological Tables (2004) Rarely transparentMore from other references and OpaqueUlrich Henn and Claudio C. Milisenda while Proustite is Gemmological Tables (2004) Rarely transparentMore from other references and OpaqueUlrich Henn and Claudio C. Milisenda in appearance.