Lawsonite and Proustite Optical Properties

Lawsonite

Proustite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Greasy

Adamantine

1.2 Pleochroism

Weak

Moderate; cochineal-red to blood-red

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

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

1.5 Refractive Index

1.672-1.6762.792-3.087

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.019-0.0210.295-0.296

0 0.296

1.9 Clarity

Not Available

OpaqueUlrich Henn and Claudio C. Milisenda

Lawsonite and Proustite Optic Character

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

Lawsonite Vs Paraiba

Lawsonite Vs Sulfur

Lawsonite Vs Sylvite

Lawsonite and Proustite Transparency

Similar to their colors, Lawsonite and Proustite 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, Lawsonite is Not Available while Lawsonite is Not Available in appearance.