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Lawsonite
Lawsonite

Purpurite
Purpurite



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Lawsonite
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Purpurite

Lawsonite and Purpurite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy
Not Available
1.2 Pleochroism
Weak
StrongArthur Thomas
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
TranslucentWalter Schumann, Gemstones of the world (2001) More from other references
1.5 Refractive Index
1.672-1.676
1.85-1.92
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.019-0.021
0.070
1.9 Clarity
Not Available
TranslucentWalter Schumann

Lawsonite and Purpurite Optic Character

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

Lawsonite and Purpurite Transparency

Similar to their colors, Lawsonite and Purpurite 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.