Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

Cuprite

2.45

2.45

5.92

5.92

black-red

0.15ct

cutoff 650

ACAM labo  1064

Cuprite

6.12

6.12

very dark orangy red

Onganja Mine, Khomas, Namibia

16.64ct

broad absorption below 645nm

inert

inert

GIA Gem Database  34705

Stone

RI min

RI max

Dens min

Dens max

Reference

Cuprite

2.848

2.849

5.85

6.15

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

Cuprite

2.848

2.848

5.8

6.2

Gemmological Tables, Ulrich Henn, 2004 

Cuprite

2.848

2.848

6

6.14

http://www.gemmology.be 

Cuprite

2.848

2.852

5.85

6.15

http://www.geminterest.com 

Cuprite

2.848

2.848

6

6.14

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Cuprite

2.848

2.848

6

6.14

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

Cuprite

2.849

2.849

5.85

6.15

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Cuprite

2.85

2.85

6.12

6.13

John Sinkakas, Gemstone and mineral data book,1972 

Cuprite

2.85

2.85

5.85

6.15

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Cuprite

2.85

2.85

5.85

6.15

Gems, R Webster, 5th edition 1994 

Stone

Colour

Cause of colour

Reference

Cuprite

red

band theory

Gems & Gemology Summer 1988

STONE

LOCALITIES

REFERENCE

Cupriet

Ogonja Mine (Onganja Mine), Ogonja (Onganja), Seeis

Windhoek District

Khomas Region

Namibië

Namibia, Zauberwelt edler Steine und Kristalle, Steffen Jahn e.a., 2001