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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

Chondrodite

1.589

1.62

0.027

0.029

3.2

3.24

brownish yellow

Tanzania

 

1.589

1.593

 

 

1.618

1.620

none

moderate yellow

inert

Gems & Gemology 2007 winter,p377

Chondrodite

1.592

1.623

0.028

0.029

3.12

3.2

brownish yellow to yellow, orangy yellow

Tanga region, Tanzania

 

 

 

 

 

 

 

no features

weak to moderate yellow

inert

The Journal of Gemmology 2015 Vol 38, No 8, p654

Chondrodite

1.594

1.621

0.027

0.027

 

 

 

Mahenge, Tanzania

0.34ct, biaxial +

1.594

1.594

1.602

1.602

1.621

1.621

no lines

slightly chalky yellow

inert

Gems & Gemology 2011 Winter, p316

Chondrodite

1.609

1.639

0.027

0.028

3.17

3.22

oranje-brown

Balangoda, Sri Lanka

 

1.609

1.612

 

 

1.636

1.639

 

inert

inert

The Journal of Gemmology 2002 Vol28, N°3, p162-168

 

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

Chondrodite

1.589

1.646

0.025

0.036

3.16

3.26

1.589

1.616

1.602

1.627

1.618

1.646

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

Chondrodite

1.59

1.628

0.026

0.036

3.1

3.1

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Chondrodite

1.59

1.646

0.028

0.04

3.1

3.26

1.590

1.615

 

 

1.620

1.646

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

Chondrodite

1.59

1.64

0.03

0.03

3.1

3.2

1.590

1.600

 

 

1.620

1.640

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Chondrodite

1.59

1.64

0

0

3.1

3.2

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Chondrodite

1.59

1.657

0.025

0.036

3.15

3.27

 

 

 

 

 

 

Gemmo.eu 2016

Chondrodite

1.592

1.646

0.028

0.034

3.16

3.26

1.592

1.615

1.602

1.627

1.621

1.646

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Chondrodite

1.592

1.646

0.028

0.034

3.16

3.26

1.592

1.615

1.602

1.627

1.621

1.646

http://www.geminterest.com 

Chondrodite

1.592

1.646

0.028

0.034

3.16

3.26

 

 

 

 

 

 

http://www.gemmology.be 

Chondrodite

1.592

1.675

0.027

0.032

3.1

3.2

 

 

 

 

 

 

Gemology Tools Professional 2010

Chondrodite

1.594

1.637

0.025

0.036

3.1

3.2

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Chondrodite

1.594

1.67

0.025

0.036

3.1

3.2

1.594

1.643

 

 

1.619

1.670

Gemmological Tables, Ulrich Henn, 2004 

Chondrodite

1.613

1.67

0.03

0.027

3.1

3.2

1.613

1.643

 

 

1.643

1.670

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Chondrodite

Balangoda

Ratnapura District

Sabaragamuwa Province

Sri Lanka

The Journal of Gemmology 2002, Vol28, N°3, p162-168

Chondrodite

 

 

 

Tanzania

Gems & Gemology 2007 Winter, p377

Chondrodite

Tilly Foster mine, Brewster

Putnam County

New York

USA

Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006),  873pp

 

CHEMICAL DATA