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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

Beryllonite

1.549

1.554

0.005

0.005

2.85

2.85

colourless

Oxford County, Maine, USA

5.68ct

 

 

 

 

 

 

 

 

 

GIA Gem Database  33936

Beryllonite

1.55

1.55

 

 

2.8

2.8

white

Afghanistan

transparent, cat's-eye

 

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1994 Dez, p105-106

Beryllonite

1.55

1.56

0.01

0.01

2.88

2.88

colourless

Oxford County, Maine, USA

7.82ct

 

 

 

 

 

 

 

 

 

GIA Gem Database  35350

Beryllonite

1.55

1.56

0.01

0.01

2.82

2.82

colourless

Brazil

0.19ct

1.550

1.550

1.556

1.556

1.560

1.560

 

inert

inert

ACAM Lab  874

Beryllonite

1.551

1.56

0.009

0.009

2.86

2.86

 

Oxford County, Maine, USA

8.12ct

 

 

 

 

 

 

 

 

very weak green

GIA Gem Database  33939

 

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

Beryllonite

1.549

1.563

0.008

0.011

2.76

2.84

 

 

 

 

 

 

Gemmo.eu 

Beryllonite

1.552

1.562

0.01

0.01

2.83

2.87

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Beryllonite

1.552

1.562

0.009

0.009

2.8

2.85

1.552

1.552

1.558

1.558

1.561

1.562

http://www.geminterest.com 

Beryllonite

1.552

1.562

0.009

0.01

2.8

2.87

1.552

1.552

 

 

1.561

1.562

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

Beryllonite

1.552

1.561

0.009

0.009

2.83

2.87

1.552

1.552

1.558

1.558

1.561

1.561

Gemmological Tables, Ulrich Henn, 2004 

Beryllonite

1.552

1.562

0.009

0.009

2.8

2.85

 

 

 

 

 

 

http://www.gemmology.be 

Beryllonite

1.552

1.561

0.009

0.009

2.8

2.85

1.552

1.552

1.558

1.558

1.561

1.561

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryllonite

1.552

1.561

0.009

0.009

2.77

2.85

 

 

 

 

 

 

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

Beryllonite

1.552

1.562

0.009

0.01

2.813

2.821

 

 

 

 

 

 

Gemology Tools Professional 2010

Beryllonite

1.553

1.562

0.009

0.009

2.8

2.85

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Beryllonite

1.553

1.562

0.009

0.009

2.79

2.85

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Beryllonite

1.553

1.562

0.009

0.009

2.8

2.85

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Beryllonite

Stoneham

Oxford County

Maine

USA

Joel Arem, Color Encyclopedia of Gemstones, 1987

 

CHEMICAL DATA