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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

Scheelite

 

 

 

 

5.71

5.71

colourless

Inner Mongolia, China

41.83 ct

 

 

 

 

 

moderate chalky yellowish pink

strong chalky yellow

The Journal of Gemmology 2014 Vol 34, No 3, p202-203

Scheelite

 

 

 

 

5.9

6.03

yellowish white to brownish to almost colourless

Sri Lanka

 

 

 

 

 

strong band 520nm, moderate bands 525, 530, 575, 580, 596

 

 

The Australian Gemmologist 1982 may, p240

Scheelite

1.92

1.935

0.012

0.015

5.94

6.3

colourless, very light yellow, greyish white

Colombage, Sri Lanka

 

1.930

1.935

1.920

1.922

 

distinct whitish blue

dull oily yellow

Gems & Gemology 1986 fall, p 166-169

Scheelite

 

 

 

 

5.94

5.94

slightly brownish yellow

Khaplu, Pakistan

4.28ct

 

 

 

 

lines at 560 and 570nm, band at 580-590nm

strong whitish-blue

very weak orange

The Journal of Gemmology 2014 Vol 34, N°4, p 298-299

Scheelite

1.918

1.934

0.016

0.016

6.102

6.102

yellow, white, green

Sakangyi, Mogok, Birma

 

 

 

 

 

 

yellow stones: whitish yellow; white and green stones: blue

yellow stones: whitish yellow; white and green stones: blue

The Australian Gemmologist 2005 22, p303-309

Scheelite

 

 

 

 

6.11

6.11

yellow-brown

Sri Lanka

61.73 ct, asteriated (4 ray star)

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1996 Mar, p2

Synthetic scheelite

1.9

1.9

 

 

6.11

6.11

yellow

 

1.22ct, RI jemeter

 

 

 

 

lines around 580nm

bluish yellow

yellow

ACAM Lab  4002

Scheelite

 

 

 

 

6.12

6.12

greenish yellow

Australia

9.36ct

 

 

 

 

broad absorption below 430 and above 680nm

strong green

inert

GIA Gem Database  34102

Scheelite

1.918

1.936

0.018

0.018

6.15

6.15

colourless

Kern County, California

 

 

 

 

 

 

very strong blue

dull oily yellow

Gems & Gemology 1986 fall, p 166-169

Synthetic scheelite

 

 

 

 

6.16

6.16

yellow

 

 

 

 

 

 

 

orange

orange

The Journal of Gemmology 1970 N°4,p133-135

Scheelite

 

 

 

 

6.19

6.19

orange

China

11.82ct

 

 

 

 

broad absorption below 430 and lines at 492, 526, 532, 535, 538, 577, 581, 587, 591, 597

yellow + whitish blue

inert

GIA Gem Database  34099

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Scheelite

1.918

1.938

0.016

0.016

5.1

6.3

1.934

1.938

1.918

1.921

http://www.geminterest.com 

Scheelite

1.92

1.939

0.015

0.017

5.89

6.15

 

 

 

 

Gemmo.eu 

Scheelite

1.915

1.937

0.016

0.038

5.9

6.12

 

 

 

 

Gemology Tools Professional 2010

Scheelite

1.918

1.937

0.012

0.019

5.9

6.3

1.930

1.937

1.918

1.922

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

scheelite synthetic

1.918

1.934

0.016

0.016

5.9

6.1

1.934

1.934

1.918

1.918

Gemmological Tables, Ulrich Henn, 2004 

Scheelite

1.918

1.937

0.016

0.016

5.9

6.3

 

 

 

 

http://www.gemmology.be 

Scheelite

1.918

1.934

0.016

0.016

5.9

6.1

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Scheelite

1.918

1.937

0.016

0.016

5.9

6.3

1.934

1.937

1.918

1.920

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Scheelite

1.918

1.934

0.016

0.016

5.9

6.1

 

 

 

 

Gems, R Webster, 5th edition 1994 

Scheelite

1.918

1.937

0.016

0.016

5.9

6.3

1.934

1.937

1.918

1.920

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

Scheelite

1.918

1.938

0.016

0.016

5.9

6.3

1.94

1.94

1.92

1.92

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

scheelite synthetic

1.92

1.937

0.017

0.017

5.9

6.1

1.937

1.937

1.920

1.920

Joel Arem, Color Encyclopedia of Gemstones, 1987 

scheelite synthetic

1.92

1.936

0.016

0.016

5.9

6.1

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

scheelite synthetic

1.92

1.932

0.015

0.017

5.9

6.16

1.932

1.932

1.920

1.920

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

scheelite synthetic

1.92

1.936

0.016

0.016

5.9

6.11

 

 

 

 

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

scheelite synthetic

1.92

1.937

0.017

0.017

5.9

6.1

 

 

 

 

Gemology Tools Professional 2010

scheelite synthetic

1.936

1.922

0.016

0.017

5.9

6.1

1.936

1.938

1.918

1.922

http://www.geminterest.com 

synthetic scheelite

1.92

1.938

0.015

0.017

5.95

6.15

 

 

 

 

Gemmo.eu 

Scheelite

1.918

1.937

0.016

0.017

6

6.1

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Scheelite

1.918

1.935

0.015

0.016

6

6.3

1.934

1.935

1.918

1.920

Gemmological Tables, Ulrich Henn, 2004 

Scheelite

1.918

1.936

0.01

0.018

6.06

6.3

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

scheelite synthetic

 

 

 

 

6.1

6.1

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Scheelite

blue

O²-->W

Alain Abréal, juillet 2002

Scheelite

yellow

Fe (not proven)

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Scheelite

Sakangyi

Mogok

Mandalay

Myanmar

The Australian Gemmologist (2005) 22, p308

Scheelite

Turmalina Mine

 

Piura Department

Peru

Hyrsl & Rosales (2003) Mineralogical Record, 34, 241-254.

Scheelite

Embilipitiya

Monaragata

Southern Province

Sri Lanka

Gemmologie Jul 1999, p90

Scheelite

 

Kern County

California

USA

Gems & Gemology 1986 fall, p 166-169

 

CHEMICAL DATA (%)