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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Location

Info

ne min

ne max

no min

no max

Spectrum

UVS

UVL

Reference

Ekanite

1.59

1.59

 

 

3.27

3.27

greenish brown

Sri Lanka

2.79ct

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169

Ekanite - metamict

1.59

1.59

 

 

3.28

3.28

green

 

 

 

 

 

 

 

 

 

Gems & Gemology 1962 Summer, p317

Ekanite - metamict

1.59

1.59

 

 

3.28

3.28

brownish green

Sri Lanka

0.18ct

 

 

 

 

 

inert

inert

ACAM lab  2293

Ekanite - metamict

1.591

1.591

 

 

3.261

3.261

deep green

Eheliyagoda district, Sri Lanka

transparent

 

 

 

 

lines 661, 590, 640, band 410-400

inert

inert

The Australian Gemmologist 1988 Feb , p348

Ekanite - metamict

1.593

1.595

 

 

3.3

3.3

light yellowish green, dark yellowish green, dark green, yellowish brown

Sri Lanka

radioactive

 

 

 

 

band 665nm and weak band at 637

inert

inert

Gems & Gemology 1986 spring p48

Ekanite - metamict

1.595

1.595

 

 

3.28

3.285

dark yellow-green, green, dark greenish brown, dark green

Ellawala, Sri Lanka

12 stones

 

 

 

 

 

 

 

Gems & Gemology 1961 Summer, p

Ekanite - metamict

1.595

1.595

 

 

3.288

3.288

blackish

 

radioactive

 

 

 

 

lines at 630 and 658nm

 

 

The Journal of Gemmology 1974 N°4, p169

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Ekanite

1.572

1.573

0.001

0.001

 

 

1.572

1.572

1.573

1.573

Gemmological Tables, Ulrich Henn, 2004 

Ekanite

1.572

1.573

0.001

0.001

3.28

3.32

 

 

 

 

http://www.gemmology.be 

Ekanite

1.59

1.596

0.001

0.001

2.95

3.36

 

 

 

 

http://www.geminterest.com 

Ekanite - metamict

1.59

1.596

0.001

0.001

3.28

3.32

 

 

1.590

1.596

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Ekanite - metamict

1.59

1.597

0.001

0.001

3.28

3.32

1.590

1.596

1.591

1.597

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

Ekanite

1.593

1.596

 

 

3.28

3.28

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Ekanite

1.595

1.6

 

 

3.28

3.28

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Ekanite

1.596

1.596

 

 

3.28

3.28

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Ekanite - metamict

1.597

1.597

 

 

3.28

3.32

 

 

 

 

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

Ekanite

1.597

1.597

 

 

3.28

3.28

 

 

 

 

Gems, R Webster, 5th edition 1994 

Ekanite - metamict

1.597

1.597

 

 

3.28

3.28

 

 

 

 

Gemology Tools Professional 2010

Ekanite

1.567

1.598

0

0.013

2.94

3.37

 

 

 

 

Gemmo.eu 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

CaO

PbO

ThO2

UO2

Ekanite - metamict

green

 

Sri Lanka

Gems & Gemology 1961, Summer, p173

55

0.8

12

0.65

28

3