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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Locality

Info

nx min

nx max

ny min

ny max

nz min

nz max

Spectrum

UVS

UVL

Reference

phosphosiderite

1.7

1.7

 

 

2.59

2.59

purplish pink

 

cabochon 9.34ct, opaque, RI spot

 

 

 

 

 

 

 

light brown-yellow

green

ACAM Lab  1931

phosphosiderite

 

 

 

 

2.56

2.56

purple, opaque

 

3.61 and 3.63 ct, cabochons, impregnated with a polymer

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2016 Jun, p56-59

 

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

phosphosiderite

1.69

1.74

0.045

0.047

2.72

2.78

 

 

 

 

 

 

Gemmo.eu 2016

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Phosphosiderite

 

Copiapo

Atacama

Chili

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft, Jun 2016, p 59







 

CHEMICAL DATA (%)