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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

Hemimorphite

1.61

1.62

 

 

3.31

3.34

mottled blue

Congo Brazaville

cabochons 50.65 and 114.96 ct, translucent

 

 

 

 

 

 

none

weak greenish blue

inert or weak bluish white

Gems & Gemology 2002 fall p 263

Hemimorphite

1.61

1.62

0.02

0.02

3.43

3.43

light blue

 

 

 

 

 

 

 

 

 

 

 

Gems & Gemology 1971 Winter, p383

Hemimorphite

1.61

1.62

 

 

3.13

3.13

pale greenish blue

Yunnan Province, China

6.62 ct cabochon, spot RI

 

 

 

 

 

 

 

 

 

Gems & Gemology 2012 Fall, p222-223

Hemimorphite

1.613

1.635

 

 

3.45

3.45

greenish blue

 

cabochon, 9.80ct

 

 

 

 

 

 

no absorption lines

inert

inert

Gems & Gemology 2002 Fall, p254

Hemimorphite

1.62

1.62

 

 

 

 

greenish blue

 

cabochon, 8 x 6 mm, spot RI

 

 

 

 

 

 

no lines

inert

inert

Gems & Gemology 1998 Spring, p44-45

 

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

Hemimorphite

1.611

1.639

0.022

0.022

3.4

3.5

 

 

 

 

 

 

Gemology Tools Professional 2010

Hemimorphite

1.612

1.633

0.021

0.021

3.44

3.44

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Hemimorphite

1.612

1.638

0.02

0.023

3.4

3.5

 

 

 

 

 

 

Gemmo.eu 

Hemimorphite

1.614

1.636

0.022

0.022

3.4

3.5

1.614

1.614

1.617

1.617

1.636

1.636

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Hemimorphite

1.614

1.636

0.022

0.022

3.3

3.5

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Hemimorphite

1.614

1.636

0.022

0.022

3.3

3.5

1.614

1.614

1.617

1.617

1.636

1.636

http://www.geminterest.com 

Hemimorphite

1.614

1.636

0.022

0.022

3.3

3.5

1.614

1.614

 

 

1.636

1.636

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

Hemimorphite

1.614

1.636

0.022

0.022

3.3

3.5

1.614

1.614

1.617

1.617

1.636

1.636

Gemmological Tables, Ulrich Henn, 2004 

Hemimorphite

1.614

1.636

0.022

0.022

3.4

3.5

 

 

 

 

 

 

http://www.gemmology.be 

Hemimorphite

1.614

1.636

0.022

0.022

3.3

3.5

 

 

 

 

 

 

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

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Hemimorphite

 

 

 

Congo Brazzaville

Gems & Gemology 2002 fall p 263

 

CHEMICAL DATA