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

Hübnerite

2,271

2,271

7,16

7,16

black (reddish)

Past Buene, Peru

0,75ct

http://www.dgemg.com/ 2023 jan

Hübnerite

7,26

7,26

dark red-brown

0.91ct

inert

inert

ACAM lab  4739

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

Stone

Hübnerite

2.12

2.33

0.125

0.135

7.1

7.25

Gemmo.eu 

Hübnerite

2.17

2.32

0.13

0.13

7.12

7.18

2.170

2.200

2.220

2.220

2.300

2.320

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Hübnerite

2.17

2.32

0.13

0.13

7.12

7.18

http://www.gemmology.be 

Hübnerite

2.17

2.32

0.13

0.13

7.12

7.18

2.170

2.200

2.300

2.320

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

Hübnerite

2.17

2.32

0.13

0.13

7.12

7.18

Gemology Tools Professional 2010