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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

Actinolite

1.6

1.63

0.03

0.03

 

 

green

Pakistan

 

1.600

1.600

1.613

1.613

1.630

1.630

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2000 Sep, p122

Nephrite

1.6

1.6

 

 

2.74

2.96

white and white-green to a rarer yellowish green and green

Val Malenco, Italy

opaque, cabochon 3.33 - 25.34 ct, 70 - 100% (green) tremolite and 30 % (white) - 0% calcite

 

 

 

 

 

 

 

inert

inert

Gems & Gemology 2013 Summer, p98-106

Nephrite

1.602

1.625

0.023

0.023

 

 

 

Jordanow, Silesia, Poland

 

 

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1988 36, Nr 3/4,p153-160

Nephrite

1.61

1.61

 

 

2.95

2.96

mottled green (dyed)

 

cabochons, 6.38-7.12 ct, spot RI

 

 

 

 

 

 

broad dye band in the red region about 660nm

 

 

Gems & Gemology 1995 Spring, p55

Actinolite

1.61

1.63

0.024

0.024

3.04

3.04

green

Tanzania

1.05 ct

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2013 62/1-2, Jun, p33-34

Nephrite

1.613

1.63

0.017

0.017

 

 

dark green

 

 

 

 

 

 

 

 

 

 

 

South African Gemmologist 1997 11 (1), p13

Actinolite

1.616

1.641

0.025

0.025

3.03

3.03

green

 

transparent

1.616

1.616

1.633

1.633

1.641

1.641

 

 

 

The Journal of Gemmology 1972 N°1, p8

Actinolite

1.619

1.639

0.02

0.02

3.08

3.08

brownish yellow

Mandalay, Myanmar

17.86 ct, transparent, biaxial -

 

 

 

 

 

 

 

weak yellowish green

 

GIA Gem Database  34539

Actinolite

1.62

1.64

0.02

0.02

3.06

3.06

dark bluish green

Tanzania

5.44 ct, biaxial -

 

 

 

 

 

 

445nm line

inert

inert

GIA Gem Database  34990

Nephrite

1.62

1.62

 

 

2.96

3.01

greenish white, pale yellowish-green to pale green, rarely deep green

Chuncheon, South-Korea

translucent

 

 

 

 

 

 

 

inert

inert

The Journal of Gemmology 1995 Vol 24, N°8, p547

 

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

Actinolite

1.6

1.653

0.02

0.03

3

3.2

1.600

1.633

 

 

1.630

1.653

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Nephrite

1.6

1.641

0.027

0.027

2.9

3.06

1.600

1.627

 

 

1.614

1.641

http://www.geminterest.com 

Nephrite

1.6

1.655

0.027

0.027

2.9

3.1

1.600

1.628

 

 

1.614

1.655

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

Nephrite

1.6

1.641

0.027

0.027

2.9

3.02

 

 

 

 

 

 

http://www.gemmology.be 

Nephrite

1.6

1.614

0.027

0.027

2.9

3.02

1.600

1.627

 

 

1.614

1.641

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Nephrite

1.6

1.641

0.027

0.03

2.9

3.02

1.600

1.627

 

 

1.614

1.641

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

Nephrite

1.6

1.641

 

 

2.9

3.1

 

 

 

 

 

 

Gemology Tools Professional 2010

Nephrite

1.6

1.641

 

 

2.9

3.1

 

 

 

 

 

 

Gemology Tools Professional 2010

Actinolite

1.602

1.634

0.022

0.029

2.96

3.03

1.602

1.609

1.613

1.618

1.628

1.634

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

Actinolite

1.602

1.655

0.022

0.027

3

3.34

 

 

 

 

 

 

Gemology Tools Professional 2010

Nephrite

1.606

1.632

0.026

0.027

2.9

3.03

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Nephrite

1.606

1.632

0.027

0.027

2.9

3.02

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Actinolite

1.607

1.653

0.02

0.027

3

3.44

1.607

1.633

 

 

1.630

1.653

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

actinolite cat's eye

1.607

1.633

0.014

0.024

2.98

3.07

1.607

1.619

 

 

1.630

1.633

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Nephrite

1.61

1.66

0.024

0.027

2.95

3.1

 

 

 

 

 

 

Gemmo.eu 

Actinolite

1.611

1.639

0.028

0.028

3.3

3.3

 

 

 

 

 

 

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

Actinolite

1.615

1.653

0.016

0.02

3.01

3.15

1.615

1.633

1.628

1.644

1.631

1.653

Gemmological Tables, Ulrich Henn, 2004 

Actinolite

1.615

1.633

0.014

0.016

3.01

3.01

1.615

1.619

 

 

1.631

1.633

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

Actinolite

1.618

1.645

0.02

0.025

2.9

3.15

 

 

 

 

 

 

Gemmo.eu 2013

Actinolite

1.619

1.644

0.022

0.026

3.03

3.44

1.619

1.622

1.632

1.634

1.642

1.644

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Actinolite

1.619

1.644

0.022

0.026

3.03

3.44

 

 

 

 

 

 

http://www.gemmology.be 

Actinolite

1.619

1.65

0.022

0.026

3

3.44

1.619

1.625

1.632

1.635

1.642

1.650

http://www.geminterest.com 

Actinolite

1.619

1.644

0.022

0.026

3.03

3.44

1.619

1.622

1.632

1.634

1.642

1.644

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

Actinolite

1.62

1.642

0.022

0.022

3

3.06

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Actinolite

1.62

1.644

0.022

0.023

3.03

3.07

1.619

1.622

 

 

1.642

1.644

Gems, R Webster, 5th edition 1994 

Nephrite

1.62

1.63

 

 

2.9

3

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Nephrite

1.62

1.62

0.027

0.027

2.9

3.02

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Actinolite

1.633

1.653

0.02

0.02

3.15

3.15

 

 

 

 

 

 

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

Actinolite

 

 

 

 

3

3.4

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Actinolite

green

Fe²+

Roger G. Burns, Mineralogical applications of crystal field theory, Sec Ed, 1993

Actinolite

green

traces of Cr³+

Gems & Gemology Summer 1988

Nephrite

yellowish green to green

Fe²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

LOCALITIES

STONE

LOCALITIES

REFERENCE

nephrite

Cowell

Eyre Peninsula

South Australia

Australia

Dana's New Mineralogy, Eight Edition, Richard V.Gaines e.a., 1997

nephrite

Mount Ogden

Omenica Mining Division

British Columbia

Canada

The Journal of Gemmology, 2000, Vol 27, N°4,p 193-200

nephrite

Xiuyan Jade mine, Xiuyan

Anshan Prefecture

Liaoning Province (Manchuria)

China

Gems & Gemology Fall 2010, p210

nephrite

 

Kunlun Mts (Kunlun Shan)

Xinjiang

China

Dana's New Mineralogy, Eight Edition, Richard V.Gaines e.a., 1997

nephrite

 

Paakkila

Kuopio

Finland

Mineralfundstellen Skandinavien, Dr H.-J. Wilke, 1976

nephrite

Mastiaba Talc mine, Monte Disgrazia

Val Malenco

 

Italy

The Journal of Gemmology, 2005, 29,5/6, 305-311

Actinolite

 

 

 

Madagascar

Joel Arem, Color Encyclopedia of Gemstones, 1987

nephrite

 

Arahura River

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Caples

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Dun Mountain

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Maitai River

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Mount Torlesse

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Taramakau River

South Island

New Zealand

Gems & Gemology Fall 2010, p210

nephrite

 

Jordanow Slaski (Jordansmühl)

Siliesia

Poland

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1988,36, Nr3/4 p 153-160

nephrite

Chun Cheon

Seoul (100km N)

 

South Korea

Dana's New Mineralogy, Eight Edition, Richard V.Gaines e.a., 1997

nephrite

Scortaseo, Selva

Poschiavo

Graubünden

Switserland

Mineralienlexikon der Schweiz, Hans Anton Stalder e.a., 1998

Actinolite

 

 

 

Tanzania

Joel Arem, Color Encyclopedia of Gemstones, 1987

nephrite

Dahl Creek Head; Asbestos Mountain; Ing-Ink Mine, Ambler District

Northwest Arctic Borough

Alaska

USA

U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.

Actinolite

Chester

Windsor County

Vermont

USA

Joel Arem, Color Encyclopedia of Gemstones, 1987

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

Fe2O3

K2O

NiO

P2O5

nephrite

dusky green

Cowell, Eyre Peninsula, South Australia

Australia

The Journal of Gemmology 2000, Vol 27, N°4,p198

58.82

1.38

0.12

22.06

 

0.07

11.24

0.19

 

1.75

0.11

 

0.14

nephrite

black

Cowell, Eyre Peninsula, South Australia

Australia

The Journal of Gemmology 2000, Vol 27, N°4,p198

56.09

0.83

0.07

20.19

 

0.11

12.32

0.07

 

7.78

0.15

 

0.06

nephrite

dusky yelow-green

Cowell, Eyre Peninsula, South Australia

Australia

The Journal of Gemmology 2000, Vol 27, N°4,p198

57.44

0.7

0.05

23.26

 

0.04

13.77

0.08

 

1.42

0.09

 

0.07

nephrite

moderate yellowish green

Dease Lake area, Cassiar Mts, British Columbia

Canada

The Journal of Gemmology 2000, Vol 27, N°4,p198

55.15

1.89

0.19

21.17

 

0.1

12.38

0.06

 

4.39

0.02

 

0.07

nephrite

dark yellowish green

Dease Lake area, Cassiar Mts, British Columbia

Canada

The Journal of Gemmology 2000, Vol 27, N°4,p198

54.68

1.93

0.22

20.92

 

0.15

12.23

0.05

 

5.77

0.03

 

0.11

nephrite

dark yellowish green

Mount Ogden, British Columbia

Canada

The Journal of Gemmology 2000, Vol 27, N°4,p198

56.37

1.81

0.1

21.44

 

0.11

12.91

0.11

 

3.74

0.06

 

0.06

nephrite

yellowish green

Mount Ogden, British Columbia

Canada

The Journal of Gemmology 2000, Vol 27, N°4,p198

56.23

1.74

0.09

21.38

 

0.12

12.88

0.1

 

3.61

0.06

 

0.08

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

53.21

1.16

0.8

20.81

 

 

14.08

 

 

2.4

 

 

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

57.26

1.4

0.74

19.96

 

 

13.19

 

 

4.22

 

 

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

56.93

1.01

0.71

19.21

 

 

14.54

 

 

4.99

 

 

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

56.39

1.63

0.26

24.63

 

 

7.92

 

 

5.42

 

0.13

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

54.44

5.92

0.22

16.79

 

0

7.51

4.64

 

6.28

0.28

 

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

56.74

0.93

0.06

21.75

 

0

13.09

0.22

0.13

4.39

 

0.09

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

52.58

6.74

0

21.02

 

0.12

9.84

0.54

 

4.48

0.28

 

 

nephrite

yellowish green

Jordanow Slaski

Poland

The Journal of Gemmology 2001, Vol 27, N°8, p467

57.58

1.35

0.15

20.65

 

0.1

13.1

0.12

 

4.17

 

 

 

nephrite

pale yellowish green

Chuncheon

South Korea

The Journal of Gemmology 1995, Vol 24, N°8, p 550

57.54

0.61

0.12

23.26

0.39

0.02

13.42

0.07

 

 

0.05

 

 

nephrite

greenish white

Chuncheon

South Korea

The Journal of Gemmology 1995, Vol 24, N°8, p 550

57.62

0.54

0.08

24.11

0.43

0.01

13.1

0.03

 

 

0.03

 

 

nephrite

pale green

Chuncheon

South Korea

The Journal of Gemmology 1995, Vol 24, N°8, p 550

56.98

0.59

0.1

23.06

0.51

0.01

13.29

0.06

 

 

0.03

 

 

nephrite

pale green

Chuncheon

South Korea

The Journal of Gemmology 1995, Vol 24, N°8, p 550

57.76

0.68

0.08

24.38

0.48

0.03

13.34

0.09

 

 

0.01