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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

Chrysocolla

 

 

 

 

2.34

2.5

green-blue, dark bluish green

Kasiruta, Indonesia

chrysocolla quartz

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 2006 Vol 30, No3/4 p 155-168

Chrysocolla

1.49

1.51

 

 

2.27

2.3

blue green, opaque

Peru

silicified, called gem silica or silicia, hardness 4.5

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 2001 Vol 27, N°6, p330-331

Chrysocolla

1.54

1.57

 

 

2.67

2.75

greenish blue, opaque

Peru

silicified, called gem silica or silicia, hardness 6

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 2001 Vol 27, N°6, p330-331

chrysocolla chalcedony

1.54

1.55

0.01

0.01

2.63

2.63

green-blue and blue-green

Acari, Peru

 

 

 

 

 

 

 

650nm cutoff

inert

inert

Gems & Gemology 2010 summer, p148-149

chrysocolla chalcedony

1.55

1.55

 

 

2.58

2.61

light greenish blue to blue

Peru

spot RI, cabochons (18.07-22.02ct)

 

 

 

 

 

 

 

chalky bluish white

inert

The Journal of Gemmology 2014 Vol 34/N°1, p9-10

 

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

Chrysocolla

1.4

1.6

 

 

2

2.65

 

 

 

 

 

 

http://www.geminterest.com 

Chrysocolla

1.46

1.57

0.11

0.11

2

2.24

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Chrysocolla

1.46

1.598

0.023

0.11

2

2.45

1.460

1.575

 

 

1.570

1.598

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

Chrysocolla

1.46

1.57

0.06

0.11

1.93

2.45

 

 

 

 

 

 

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

Chrysocolla

1.48

1.52

0.11

0.175

1.9

2.4

 

 

 

 

 

 

Gemmo.eu 2014

Chrysocolla

1.5

1.5

0.011

0.011

2

2.45

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Chrysocolla

1.54

1.57

0.023

0.03

2.61

2.75

 

 

 

 

 

 

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

Chrysocolla

1.575

1.635

0.023

0.05

2

2.4

1.575

1.585

1.597

1.597

1.598

1.635

Gemmological Tables, Ulrich Henn, 2004 

Chrysocolla

1.575

1.635

0.023

0.04

2

2.5

 

 

 

 

 

 

http://www.gemmology.be 

Chrysocolla

1.575

1.635

0.023

0.04

 

 

 

 

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Chrysocolla

 

 

 

 

2.2

2.2

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Chrysocolla

blue

Cu²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Chrysocolla

Kasiruta, NW of Bacan Island

Halmahera Island

Maluku Utara Province

Indonesia

The Journal of Gemmology 2006-Vol 30, No3/4 p 155

 

CHEMICAL DATA