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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

Whewellite

1.488

1.65

0.162

0.162

2.23

2.23

colourless, transparent

Sachsen, Germany

0.49ct

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2008 Dec, p124

Whewellite

1.49

1.65

0.16

0.16

2.23

2.23

 

 

 

1.490

1.490

1.555

1.555

1.650

1.650

 

 

 

Gems & Gemology 1969 Winter, p130

Whewellite

1.493

1.65

0.157

0.157

2.16

2.16

 

 

0.1ct

1.493

1.493

1.557

1.557

1.650

1.650

 

inert

bluish

ACAM lab  4732

 

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

Whewellite

1.488

1.656

0.157

0.165

2.2

2.25

 

 

 

 

 

 

Gemmo.eu 

Whewellite

1.489

1.651

0.159

0.163

2.19

2.25

1.489

1.489

1.553

1.553

1.649

1.651

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Whewellite

1.489

1.652

0.16

0.164

2.19

2.25

1.489

1.490

 

 

1.648

1.652

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

Whewellite

1.489

1.651

0.159

0.163

2.19

2.25

 

 

 

 

 

 

http://www.gemmology.be 

Whewellite

1.489

1.651

0.159

0.163

2.19

2.25

1.489

1.491

1.553

1.554

1.649

1.651

http://www.geminterest.com 

Whewellite

1.489

1.651

0.159

0.163

2.19

2.25

1.489

1.489

1.553

1.553

1.649

1.651

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

Whewellite

1.489

1.651

0.159

0.163

2.19

2.25

 

 

 

 

 

 

Gemology Tools Professional 2010

Whewellite

1.49

1.65

0.16

0.16

2.23

2.23

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Whewellite

1.49

1.652

0.16

0.164

2.23

2.25

1.490

1.490

1.555

1.555

1.650

1.652

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Whewellite

1.49

1.65

0.16

0.16

2.23

2.23

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Whewellite

1.49

1.65

0.16

0.16

2.23

2.23

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)