|
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 |
1,666 |
1,689 |
0,023 |
0,023 |
3,28 |
3,28 |
light greyish
yellow-green |
Mogok, Myanmar |
14.19ct |
|
|
|
|
|
|
no features |
very weak green |
inert |
GIA Gem Database 34565 |
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 |
1,667 |
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 |
1,692 |
0,024 |
0,024 |
3,29 |
3,29 |
greyish yellow-green |
De Kalb, New York, USA |
|
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35381 |
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 |
1,668 |
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 |
1,697 |
0,029 |
0,029 |
3,32 |
3,32 |
greyish yellowish green |
Madagascar |
8.34ct |
|
|
|
|
|
|
lines at 509 and 513nm |
inert |
inert |
GIA Gem Database 34414 |
Diopside |
1,669 |
1,7 |
0,031 |
0,031 |
3,3 |
3,3 |
green |
|
3.81 ct |
|
|
|
|
|
|
|
|
|
ACAM labo |
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 |
1,67 |
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 |
3,295 |
3,295 |
green |
|
1.28ct |
|
|
|
|
|
|
Cr |
|
|
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 |
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 |
Chrome diopside |
1,67 |
1,695 |
0,025 |
0,025 |
3,3 |
3,3 |
dark green |
Kenya |
0.91ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database 35385 |
Chrome diopside |
1,67 |
1,701 |
0,031 |
0,031 |
|
|
green |
|
|
|
|
|
|
|
|
Cr |
|
|
ACAM labo |
Diopside |
1,67 |
1,7 |
0,028 |
0,03 |
3,29 |
3,3 |
brownish green |
Zillertal, Austria |
|
1,670 |
1,672 |
1,681 |
1,684 |
1,700 |
1,700 |
|
|
|
http://www.dgemg.com/
2022 2 |
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 |
3,29 |
3,29 |
green |
|
1ct |
|
|
|
|
|
|
Cr |
|
|
ACAM labo |
Diopside |
1,672 |
1,692 |
0,02 |
0,02 |
3,29 |
3,29 |
greyish greenish yellow |
Sri Lanka |
13.55ct |
|
|
|
|
|
|
line at 512nm |
inert |
inert |
GIA Gem Database 34847 |
Chrome diopside |
1,672 |
1,701 |
0,029 |
0,029 |
3,311 |
3,311 |
green |
|
|
|
|
|
|
|
|
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 |
|
|
|
|
3,23 |
3,23 |
blue (violane) |
Lake Baikal region,
Russia |
17.88ct cabochon,
semi-translucent |
|
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology
2020 Vol 37 (2), p124-125 |
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
Inclusion |
Stone |
Reference |
enstatite |
Diopside |
E.J. Gübelin and J.I. Koivula,
Photoatlas of inclusions in Gemstones, volume 3 |
graphite |
Diopside |
Gems & Gemology Fall 2019 p 429 |
magnetite |
Diopside |
ACAM |
merelaniite |
Diopside |
Gems & Gemology Fall 2019 p 429 |
mesolite |
Diopside |
Gems & Gemology Fall 2019 p 429 |
phlogopite |
Diopside |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 3 |
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 |