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INVESTIGATIONS

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

nx min

 nx max

ny min

ny max

nz min

nz max

Reference

Fayalite

1.827

1.879

0.052

0.052

4.39

4.39

 

 

 

 

 

 

http://www.gemmology.be  

Fayalite

1.827

1.879

0.052

0.052

4.39

4.39

1.827

1.827

1.869

1.869

1.879

1.879

http://www.geminterest.com 

Fayalite

1.827

1.879

0.052

0.052

4.39

4.39

1.827

1.827

1.869

1.869

1.879

1.879

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Fayalite

1.827

1.879

0.052

0.052

4.39

4.39

 

 

 

 

 

 

Tables of Gemstone Identification, Roger Dedeyn, Ivo Quintens, 2007 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Fayalite

brown

FeČ+

http://minerals.caltech.edu/

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA