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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

Jeremejevite

1.638

1.648

0.01

0.01

3.29

3.29

colourless

Sri Lanka

106.50 ct

1.638

1.638

1.648

1.648

no features

inert

inert

The Journal of Gemmology 2014 Vol 34, No.2, p138-142

Jeremejevite

1.639

1.649

0.009

0.009

3.29

3.32

intense blue, colourless, pale yellow, violet

Erongo Mts, Namibia

production stopped in 2001

1.639

1.640

1.648

1.649

 

inert

inert

Gems & Gemology 2002 fall p 264-265

Jeremejevite

1.639

1.648

0.009

0.009

3.3

3.3

 

Namibia

1.51ct

 

 

 

 

 

 

 

Gems & Gemology 1973 Summer,p184-185

Jeremejevite

1.64

1.651

0.009

0.009

3.28

3.31

yellow, light blue

Cape Cross, Namibia and Tajikistan

anomalous optical properties : uniaxial (-) or biaxial (-) with small V

1.640

1.642

1.649

1.651

 

 

 

Gems & Gemology 2001 Fall p 206-211

Jeremejevite

1.64

1.653

0.013

0.013

3.28

3.31

colourless, yellow

Mogok, Myanmar

transparent

1.653

1.653

1.640

1.640

 

inert

inert

The Australian Gemmologist 2006 22/9 Jan-Mar

Jeremejevite

1.64

1.649

0.009

0.009

3.29

3.29

colourless

Sri Lanka

 

 

 

 

 

none

inert

inert

Gems & Gemology 2006 summer, p175-176

Jeremejevite

1.641

1.65

0.009

0.009

3.33

3.33

colourless

 

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1986 Jg 35, Nr 1-2, p72

Jeremejevite

1.643

1.65

0.007

0.007

3.29

3.29

light yellowish, orange

Myanmar

 

 

 

 

 

none

weak yellow

inert

Gems & Gemology 2006 summer, p175-176

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Jeremejevite

1.636

1.655

0.006

0.014

3.22

3.32

 

 

 

 

Gemmo.eu 2015

Jeremejevite

1.637

1.653

0.007

0.013

3.28

3.31

1.637

1.644

1.644

1.653

http://www.geminterest.com 

Jeremejevite

1.637

1.653

0.007

0.013

3.28

3.31

1.637

1.644

1.644

1.653

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

Jeremejevite

1.637

1.653

0.007

0.013

3.28

3.31

1.637

1.644

1.644

1.653

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Jeremejevite

1.637

1.653

0.007

0.013

3.28

3.31

1.637

1.644

1.644

1.653

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

Jeremejevite

1.637

1.653

0.007

0.013

3.28

3.31

 

 

 

 

Gemology Tools Professional 2010

Jeremejevite

1.637

1.644

0.007

0.013

3.28

3.29

1.637

1.637

1.644

1.647

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

Jeremejevite

1.638

1.65

0.007

0.009

3.3

3.33

1.638

1.639

1.647

1.650

Gemmological Tables, Ulrich Henn, 2004 

Jeremejevite

1.639

1.65

0.008

0.009

3.3

3.33

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Jeremejevite

1.639

1.648

0.009

0.009

329

3.31

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Jeremejevite

blue

Fe²+ - Fe³+ intervalence charge transfer

http://minerals.caltech.edu

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

feldspar

Jeremejevite

Gems & Gemology Fall 2001

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Jeremejevite

Ameib Farm, Usakos

Karibib District

Erongo Region

Namibia

Mineralogical Record 3/2002

Jeremejevite

Mile 72 Road Marker, Cape Cross

Swakopmund Coast

Swakopmund District

Namibia

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

Jeremejevite

Soktuj Gora, Nertschinsk (Nerchinsk) Mines, Nertschinsk District, Adun-Cholon Range, Buriatia

Transbaikalia (Zabaykalye)

Siberia

Russia

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

Jeremejevite

 

 

 

Tajikistan

Gems & Gemology 2001 Fall p206-211

 

CHEMICAL DATA (ppm)

Stone

Colour

Locality

Reference

Mg

Ca

Ti

V

Fe

Zn

Ga

Jeremejevite

colourless

 

Sri Lanka

The Journal of Gemmology 2014, 34(2), p141

0.89

1150

8.73

1.08

142

13.6

150