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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

Clinozoisite

1.711

1.72

0.008

0.009

3.4

3.4

brownish greenish yellow to brownish yellow-green

San Diego County, California, USA

RI, Birefr, SG increase with iron content in clinozoisite

 

 

 

 

 

 

455nm line

inert

inert

Gems & Gemology 2007 spring p69

Clinozoisite

 

 

 

 

3.4

3.4

dark orangy red

California, USA

2.97ct

 

 

 

 

 

 

broad absorption below 430nm, lines at 455, 475

 

 

GIA Gem Database  35187

 

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

Clinozoisite

1.67

1.734

0.005

0.02

3.2

3.38

1.670

1.724

 

 

1.690

1.734

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

Clinozoisite

1.67

1.734

0.005

0.015

3.21

3.38

 

 

 

 

 

 

http://www.gemmology.be 

Clinozoisite

1.67

1.734

0.005

0.018

3.2

3.4

1.670

1.715

1.675

1.725

1.690

1.734

http://www.geminterest.com 

Clinozoisite

1.67

1.734

0.005

0.015

3.21

3.38

1.670

1.715

1.675

1.725

1.690

1.734

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Clinozoisite

1.67

1.734

0.005

0.015

3.21

3.4

1.670

1.715

1.675

1.725

1.690

1.734

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

Clinozoisite

1.697

1.729

0.005

0.015

3.3

3.4

1.697

1.714

1.699

1.722

1.702

1.729

Gemmological Tables, Ulrich Henn, 2004 

Clinozoisite

1.72

1.724

0.01

0.01

3.25

3.5

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Clinozoisite

1.72

1.73

0.01

0.01

3.37

3.37

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Clinozoisite

1.721

1.74

0.01

0.01

3.21

3.38

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Clinozoisite

1.724

1.734

0.01

0.01

3.37

3.37

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Clinozoisite

brown

Fe³+

http://minerals.caltech.edu

Clinozoisite

green

Cr³+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Clinozoisite

Kandaketiya

Badulla

Ratnapura

Sri Lanka

Gems & Gemology 1988 Fall p 179

 

CHEMICAL DATA