Gemsdat
 

                Home            Gemstones

 

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

Diopside

1.666

1.696

0.03

0.03

3.27

3.46

colourless to yellow

Kajiado, Kenya

 

 

 

 

 

 

 

450nm line, weak band at 430

 

 

Gems & Gemology 2012 Spring, p63-64

Diopside

1.667

1.693

0.025

0.026

3.29

3.29

light yellowish green to yellowish green

Central Asia

"Tashmarine", chelsea: yellow-green, 5 stones up to 25.16ct

1.667

1.667

 

 

1.692

1.693

lines at 440, 490, 505, and 550 nm

 

 

Gems & Gemology 2002 Fall, p261-262

Diopside

1.668

1.698

0.028

0.03

3.22

3.27

yellowish green

Tanzania

0.11 to 1.45 ct

1.668

1.670

 

 

1.698

1.698

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2009 58/3-4/Dec, p79-80

Diopside

1.668

1.698

0.03

0.03

3.32

3.32

greenish brown

Sri Lanka

 

 

 

 

 

 

 

absorption lines in blue

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169

Diopside

1.668

1.696

0.028

0.028

3.31

3.31

yellowish green

Sri Lanka

0.48ct

1.668

1.668

1.681

1.681

1.696

1.696

 

inert

inert

ACAM lab  2282

Diopside

1.669

1.7

0.031

0.031

3.3

3.3

green

 

3.81 ct

 

 

 

 

 

 

 

 

 

ACAM labo 

Diopside

1.67

1.7

0.03

0.03

3.3

3.3

yellowish green

Merelani, Tanzania

chelsea : none

 

 

 

 

 

 

none

weak greenish

very weak orange

Gems & Gemology 2007 summer p146-148

Chrome diopside

1.67

1.7

0.028

0.029

3.3

3.3

dark green

Inagly mine, Yakutsk, Siberia

transparent, chelsea : no reaction

1.670

1.672

 

 

1.699

1.700

cut-off 520nm, chrome bands at 630, 660 and 690

inert

inert

Gems & Gemology 1996 Fall, p216

Chrome diopside

1.67

1.701

0.031

0.031

 

 

green

 

 

 

 

 

 

 

 

Cr

 

 

ACAM labo 

Chrome diopside

1.67

1.7

0.03

0.03

3.295

3.295

green

 

1.28ct

 

 

 

 

 

 

Cr

 

 

ACAM labo 

Chrome diopside

1.67

1.698

0.028

0.028

3.28

3.28

intense green

Pakistan

 

1.670

1.670

1.680

1.680

1.698

1.698

two absorption bands with maxima at 645 and 453nm

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1996 Sep, p97

Chrome diopside

1.67

1.7

0.03

0.03

3.247

3.284

emerald green

Russia

 

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 1984 Vol 19, N°3 p213-217

Diopside

1.67

1.698

0.025

0.028

3.27

3.27

light yellowish green to yellowish green

Northern areas, Pakistan

 

1.670

1.675

 

 

1.695

1.698

505 nm line

inert

inert

Gems & Gemology 2010 winter, p313-314

Chrome diopside

1.671

1.698

0.027

0.03

3.26

3.26

dark grass-green to emerald-green

Inagli Massif, Aldan Shield, Siberia, Russia

 

1.671

1.682

1.674

1.686

1.698

1.708

 

 

 

World of Stones 1996 N°11, p10-14

Chrome diopside

1.672

1.701

0.029

0.029

3.311

3.311

green

 

 

 

 

 

 

 

 

Cr

 

 

ACAM labo 

Chrome diopside

1.672

1.701

0.029

0.029

3.29

3.29

green

 

1ct

 

 

 

 

 

 

Cr

 

 

ACAM labo 

Diopside

1.674

1.703

0.027

0.028

3.29

3.3

olive green

Badashkan, Afghanistan

 

1.674

1.675

 

 

1.701

1.703

450, 505, 550nm

inert

inert

Gems & Gemology 2006 winter, p 272

Diopside

1.676

1.7

0.024

0.024

3.27

3.3

medium dark yellowish green

Ihosy, Madagascar

5.93 and 6.50 ct

 

 

 

 

 

 

lines at 490 and 505 nm

inert

inert

Gems & Gemology 2010 Spring, p65

Diopside

1.678

1.705

0.027

0.027

3.3

3.32

chrome green

Badashkan, Afghanistan

 

1.678

1.678

 

 

1.705

1.705

Cr-lines

inert

inert

Gems & Gemology 2006 winter, p 272

Diopside

1.667

1.695

0.028

0.028

3.28

3.28

colourless

Canada

0.91ct

 

 

 

 

 

 

 

bluish white

orange

The Journal of Gemmology 2014 Vol 34, N°4, p 291-292

Diopside

1.67

1.695

0.025

0.025

3.3

3.3

near colourless (very pale yellow)

Kenya

0.25 ct

 

 

 

 

 

 

 

bluish white

inert

The Journal of Gemmology 2014 Vol 34, N°4, p 291-292

 

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

Diopside

1.66

1.726

0.024

0.028

3.2

3.41

1.660

1.695

1.672

1.701

1.693

1.726

http://www.geminterest.com 

Diopside

1.662

1.705

0.024

0.03

3.2

3.4

 

 

 

 

 

 

Gemmo.eu 

Diopside

1.664

1.73

0.024

0.03

3.25

3.33

1.664

1.675

 

 

1.690

1.730

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Diopside

1.664

1.73

0.024

0.034

3.17

3.38

1.664

1.695

 

 

1.690

1.730

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

Diopside

1.664

1.721

0.024

0.031

3.22

3.38

 

 

 

 

 

 

http://www.gemmology.be 

Diopside

1.664

1.721

0.024

0.031

3.22

3.38

1.664

1.695

1.672

1.701

1.695

1.721

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Diopside

1.664

1.721

0.024

0.031

3.22

3.38

1.664

1.695

1.672

1.701

1.695

1.721

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

Diopside

1.665

1.73

0.026

0.031

3.25

3.31

1.665

1.702

 

 

1.694

1.730

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Chrome diopside

1.665

1.73

0.024

0.03

3.22

3.4

 

 

 

 

 

 

Gemology Tools Professional 2010

Diopside

1.665

1.73

0.024

0.03

3.22

3.4

 

 

 

 

 

 

Gemology Tools Professional 2010

Diopside

1.668

1.703

0.028

0.033

3.24

3.33

1.668

1.670

1.677

1.681

1.698

1.703

Gemmological Tables, Ulrich Henn, 2004 

Chrome diopside

1.668

1.705

0.026

0.028

3.2

3.41

1.668

1.678

1.679

1.680

1.698

1.705

http://www.geminterest.com  

Chrome diopside

1.668

1.702

0.028

0.028

3.17

3.32

1.668

1.674

1.680

1.680

1.698

1.702

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Chrome diopside

1.668

1.702

0.028

0.028

3.17

3.32

1.668

1.674

1.680

1.680

1.698

1.702

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

Diopside

1.67

1.702

0.03

0.03

3.2

3.34

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Diopside

1.67

1.7

0.026

0.03

3.23

3.33

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Schefferite - diopside

1.676

1.705

0.031

0.031

3.2

3.41

1.676

1.676

1.683

1.683

1.705

1.705

http://www.geminterest.com 

Schefferite - diopside

1.676

1.705

0.031

0.031

3.39

3.39

1.676

1.676

1.683

1.683

1.705

1.705

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Schefferite - diopside

1.676

1.705

0.031

0.031

3.39

3.39

 

 

 

 

 

 

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

Schefferite - diopside group

1.676

1.705

0.031

0.031

3.39

3.39

 

 

 

 

 

 

Gemology Tools Professional 2010

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Diopside

blue

Cr4+  in octahedral coordination

Alain Abréal, juillet 2002

Chrome diopside

green

Cr³+ in octahedral coordination

Gems & Gemology Summer 1988

Diopside

yellow

Fe³+

Gems & Gemology Spring 2012, p64

Diopside

yellowish green

Fe²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Diopside

 

 

Badakhshan

Afghanistan

Gems & Gemology 2006 winter, p272

Diopside

Yinnietharra pegmatite, Yinnietharra Station

Pilbara Region

Western Australia

Australia

The Australian Gemmologist 2006, jul-sep, p500

Violane-Diopside

Southern Baffin Island

Baffin Island

Nunavut Territory

Canada

Gems & Gemology 2007 fall, p 262

Chrome diopside

Outokumpu Mine (Mokkivaara Mine)

Outokumpu

Itä-Suomen Lääni

Finland

www.mindat.org

Diopside

St Marcel

Aosta Valley

Piemonte

Italy

http://www.minsocam.org/msa/Handbook/Diopside.PDF

Diopside

Amboasary District

Anosy (Fort Dauphin) Region

Tuléar (Toliara) Province

Madagascar

Gemmologie, Dez 1999,p196

Diopside

Departementa Faratsiho

Vakinankaratra region (Betafo - Antsirabé region)

Antananarivo Province

Madagascar

Gemmologie, Dez 1999,p196

Diopside

Miarinarivo, Ambalavao Departement

Matsiatra Region

Fianarantsoa Province

Madagascar

Gemmologie, Dez 1999,p196

Diopside

Ankazobe Department, Ankazobe Pegmatite Field

Central Merina Region

Antananarivo Province

Madagascar

Gemmologie, Dez 1999, p196

Diopside

Inagli Massif, Aldan, Aldan Shield

Saha (Sakha) Republic (Yakutia)

Siberia

Russia

World of Stones N°11, 1996

Chrome diopside

Inagli chrome diopside deposit, Inagli Massif, Aldan, Aldan Shield

Saha Republic (Sakha Republic; Yakutia)

Eastern-Siberian Region

Russia

World of Stones N°11/1996, p10-14

Diopside

Sludyanka (Slyudyanka), Baikal area, Buriatia (Buryatia) Republic

Transbaikalia (Zabaykalye)

Eastern-Siberian Region

Russia

www.mindat.org

Diopside

Umba Valley

Lelatema Mts

Arusha Region

Tanzania

Gemmologie, 1997, Mar,p31

Diopside

Merelani Hills, Umba Valley

Lelatema Mts

Arusha region

Tanzania

Le Règne Minéral 9/1996

Diopside

De Kalb

St Lawrence County

New York

USA

www.mindat.org

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

K2O

Chrome diopside

emerald green

 

Russia

The Journal of Gemmology 1986, 1986, Vol19, N°3 p216

54.601

0.219

0.033

18.003

1.032

0.07

23.528

0.341

0.591

0.012

Diopside

very pale yellow

 

Kenya

The Journal of Gemmology 2014, Vol 34, N°4, p 291

47.4

 

0.01

22.9

0.4

0.11

28.7

 

 

0.08

Diopside

colourless

 

Canada

The Journal of Gemmology 2014, Vol 34, N°4, p 291

47

 

0.05

23.3

0.24

0.08

26.7

2.23

 

0.07