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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Location

Info

ne min

ne max

no min

no max

Spectrum

UVS

UVL

Reference

Wulfenite

 

 

 

 

6.62

6.62

orange

 

 

 

 

 

 

 

 

 

ACAM labo 

Wulfenite

 

 

 

 

6.9

6.9

yellowish orange

Red Cloud mine, Trigo Mts, La Paz County, Arizona, USA

5.41ct

 

 

 

 

broad absorption below 520nm

inert

inert

GIA Gem Database  35247

Wulfenite

 

 

 

 

6.97

6.97

reddish orange

Red Cloud mine, Trigo Mts, La Paz County, Arizona, USA

2.03ct

 

 

 

 

broad absorption below 535 and above 675nm: lines at 578, 585, 587, 595

inert

inert

GIA Gem Database  35554

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Wulfenite

2.28

2.4

0.12

0.12

6.5

7

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Wulfenite

2.28

2.405

0.98

0.122

6.5

7

2.280

2.304

2.400

2.405

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

Wulfenite

2.28

2.4

0.12

0.12

6.5

7

2.280

2.280

2.400

2.400

Gemmological Tables, Ulrich Henn, 2004 

Wulfenite

2.283

2.405

0.122

0.122

6.5

7

2.283

2.283

2.405

2.405

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Wulfenite

2.283

2.405

0.122

0.122

6.5

7

 

 

 

 

http://www.gemmology.be 

Wulfenite

2.283

2.405

0.122

0.122

6.5

7

2.283

2.283

2.405

2.405

http://www.geminterest.com 

Wulfenite

2.283

2.405

0.122

0.122

6.5

7

 

 

 

 

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

Wulfenite

2.304

2.402

0.098

0.098

6.5

7

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Wulfenite

2.304

2.402

0.098

0.098

6.7

7

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Wulfenite

2.304

2.402

0.098

0.098

6.7

7

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Wulfenite

blue

Mo4+

Gems & Gemology Summer 1988

Wulfenite

yellow to red

O²- -> Cr6- charge transfer

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)