Ludlamite and Nepheline Optical Properties

Ludlamite

Nepheline

Ludlamite

Nepheline

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1 Optical Properties

1.3 Luster

Vitreous, Pearly

Vitreous, Greasy

1.5 Pleochroism

NilArthur Thomas

Not Available

1.8 Dispersion

NANA

0.007 1

1.15 Transparency

Gemmological Tables (2004) More from other references

Transparent, Translucent

1.17 Refractive Index

1.653-1.6931.529-1.547

1 3.25

1.20 Optic Character

Not Available

1.22 Crystal System

monoclinic

Hexagonal

1.24 Birefringence

0.038-0.0440.003-0.004

0 0.296

1.26 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

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