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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

Scorodite

1.785

1.816

0.027

0.031

3.29

3.29

blue

Tsumeb, Namibia

2V: 75°

1.785

1.785

1.795

1.796

1.812

1.816

 

 

 

Gems & Gemology 1976 Spring, p130-136

Scorodite

1.78

1.78

 

 

3.218

3.218

blue

Tsumeb, Namibia

 

 

 

 

 

 

 

band 420-430nm and 550-600

 

 

Gems & Gemology 1963 Spring, p18-19

Scorodite

 

 

 

 

3.29

3.29

dark blue

Tsumeb, Namibia

1.58ct

 

 

 

 

 

 

broad absorption below 450nm

inert

inert

GIA Gem Database  35510

 

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

Scorodite

1.738

1.814

0.027

0.03

3.29

3.31

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Scorodite

1.738

1.814

0.027

0.031

3.1

3.1

1.738

1.785

 

 

1.765

1.814

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

Scorodite

1.738

1.814

0.027

0.03

3.29

3.31

1.738

1.785

1.742

1.796

1.765

1.814

Gemmological Tables, Ulrich Henn, 2004 

Scorodite

1.738

1.816

0.027

0.031

3.28

3.29

 

 

 

 

 

 

http://www.gemmology.be 

Scorodite

1.738

1.816

0.027

0.031

3.28

3.29

1.738

1.785

1.742

1.796

1.765

1.816

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Scorodite

1.738

1.82

0.027

0.031

3.28

3.29

1.738

1.785

1.742

1.805

1.765

1.820

http://www.geminterest.com 

Scorodite

1.738

1.768

0.027

0.03

3.28

3.31

1.738

1.741

1.742

1.744

1.765

1.768

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

Scorodite

1.74

1.81

0.02

0.03

 

 

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Scorodite

1.74

1.8

0.07

0.07

3.22

3.22

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Scorodite

1.784

1.816

0.03

0.031

3.28

3.29

1.784

1.785

 

 

1.814

1.816

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

Scorodite

1.785

1.816

0.027

0.031

3.3

3.3

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

FeO

H2O

P2O5

As2O3

scorodite

 

Durango

Mexico

Gems & Gemology 1976 Spring p132

 

 

34.79

15.44

 

49.52

scorodite

 

Idaho

USA

Gems & Gemology 1976 Spring p132

 

 

34.02

17.33

4.8

44.4

scorodite

 

Oregon

USA

Gems & Gemology 1976 Spring p132

 

5.76

25.72

17.04

1.72

48.88

scorodite

 

 

India

Gems & Gemology 1976 Spring p132

5.58

0.2

34.8

13.8

0.04

44.53

scorodite

 

Tsumeb

Namibia

Gems & Gemology 1976 Spring p132

 

1.8

31.5

14.5

0.1

49.5