|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
Diamond |
|
|
|
|
black |
|
1.75 ct, cause of colour:
natural radiation stains |
|
|
|
Gems & Gemology 2013
Winter, p252 |
|
Diamond |
|
|
3,17 |
3,45 |
black, olive black,
greyish olive |
|
carbonado
(polycristalline) |
|
|
|
Gemmologie, Zeitschrift
der Deutschen Gemmologischen Gesellschaft 2004 |
|
Synthetic diamond |
|
|
|
|
blue |
|
HPHT-grown, 10.08ct |
|
yellow |
strong red-orange |
Gems & Gemology 2016
Winter, p416 |
|
Synthetic diamond |
|
|
|
|
colourless |
|
CVD, 5.19ct |
|
|
|
Gems & Gemology 2016
Winter, p414-415 |
|
Synthetic diamond |
|
|
|
|
colourless G |
|
CVD, 16.41ct |
|
|
|
Gems & Gemology 2022
Spring, p54 |
|
Synthetic diamond |
|
|
|
|
colourless H, VS2 |
|
CVD, 30,18ct (named Pride
of India) and 20,24ct (named Shivaya) |
|
|
|
The Journal of Gemmology
2022 38(3),p225-227 |
|
Synthetic diamond |
|
|
|
|
colourless,
near-colourless, fancy-colour |
|
improvements in colour
and clarity, larger (0.14-0.71ct) |
737nm emission
(Si-related) |
|
|
Gems & Gemology 2007
winter , p294-312 |
|
Diamond |
|
|
|
|
fancy vivid orange |
|
5.54ct |
|
moderate orange |
moderate yellow |
Gems & Gemology 1997
Fall, p213 |
|
Diamond |
|
|
|
|
Fancy Vivid purple |
|
7.34 ct |
a broad absorption band
centred at about 550 nm |
very weak yellow |
weak to medium yellow |
The Journal of Gemmology
2002 Vol 28, N°2, p7-12 |
|
Diamond |
|
|
|
|
pink |
|
|
|
|
|
Gems & Gemology 2005
Spring p36-41 |
|
Diamond |
|
|
|
|
pink to red |
|
|
415, 503, 575, 637 (most
intense), mostly weak 496, and sometimes 594 |
chalky: orange, yellow |
chalky : yellow, green,
orange, sometimes blue |
Gems & Gemology 2005
Spring p6-19 |
|
chameleon diamond |
|
|
|
|
thermochromic colour
change and/or photochromic behavior |
|
|
|
|
|
Gems & Gemology 2005
Spring p20-34 |
|
Diamond |
|
|
3,51 |
3,51 |
yellowish orange |
|
0.47ct |
broad absorption below
450nm |
inert |
inert |
GIA Gem Database 33818 |
TABLES
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Reference |
|
Diamond |
2.415 |
2.42 |
3.5 |
3.54 |
Gemmo.eu 2017 |
|
Synthetic diamond |
2.415 |
2.42 |
3.5 |
3.54 |
Gemmo.eu 2017 |
|
Diamond |
2.417 |
2.417 |
3.51 |
3.53 |
Bestimmungstabellen für Edelsteine, Birgit Günther,
1981 |
|
Diamond |
2.417 |
2.419 |
3.51 |
3.53 |
Gemme, Dati per l'identificazione, P. De Stefano et
al, 1993 |
|
Synthetic diamond |
2.417 |
2.417 |
3.52 |
3.52 |
Gemme, Dati per l'identificazione, P. De Stefano et
al, 1993 |
|
Diamond |
2.417 |
2.417 |
3.52 |
3.52 |
Gemmological Tables, Ulrich Henn, 2004 |
|
Synthetic diamond |
2.417 |
2.417 |
3.52 |
352 |
Gemmological Tables, Ulrich Henn, 2004 |
|
Diamond |
2.417 |
2.417 |
2.9 |
3.55 |
http://www.gemmology.be |
|
Synthetic diamond |
2.417 |
2.419 |
3.47 |
3.55 |
http://www.gemmology.be |
|
Diamond |
2.417 |
2.417 |
3.51 |
3.53 |
Tabellen zur Edelstein-Bestimmung, Pschichholz FGA,
1975 |
|
Diamond |
2.417 |
2.417 |
3.5 |
3.54 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Diamond |
2.417 |
2.417 |
3.51 |
3.53 |
Gemology Tools Professional 2010 |
|
Synthetic diamond |
2.417 |
2.417 |
3.51 |
4 |
Gemology Tools Professional 2010 |
|
Diamond |
2.418 |
2.418 |
3.51 |
3.52 |
John Sinkakas, Gemstone and
mineral data book,1972 |
|
Diamond |
2.42 |
2.42 |
3.52 |
3.52 |
Gems, R Webster, 5th edition
1994 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Diamond |
black |
all types:
mostly black inclusions (magnetite, hematite, native Fe) |
Gems & Gemologie Fall 2003 p200-209 |
|
Diamond |
black |
strong plastic deformation |
Gems & Gemology 2011 Fall, p223 |
|
Diamond |
black (treated) |
type Ia : irradiation, GR1 |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
blue |
type IIb : band transitions
caused by the presence of dispersed boron atoms |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
blue |
type Ia and IIa
: irradiation, GR1 |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
blue |
by a scattering
of light in the diamond from the clouds of pinpoint inclusions |
Gems & Gemology 2004 Fall, p245 |
|
Diamond |
brown |
all types :
unknown center related to deformation |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
brown (treated) |
type Ia :
various nitrogen-related defects (N3, H3, H4, others) |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
brownish orange |
type Ia: N3 +
vacancies trapped at nitrogen aggregates (N3 + H3 and rarely H4) |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
green |
type Ia &
Iia : irradiation + brown or yellow component |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
green (bluish to
yellowish) treated |
type Ia : irradiation , GR1 |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
green various shades |
type Ia :
various unknown defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
grey (often bluish) |
type IIb :
traces of boron ? |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
grey (often yellowish) |
type Ia :
hydrogen-related defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
greyish blue |
type Ia :
hydrogen-related defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
greyish green |
type Ia :
hydrogen-related defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
greyish yellow |
type Ia :
hydrogen-related defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
pale pink |
type IIa :
vacancy trapped adjacent to isolated nitrogen , N-V |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
pink to purple (treated) |
type Ib (often
with Ia) : vacancy trapped adjacent to isolated nitrogen, N-V |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
purple, pink, red |
Ia & IIa :
unknown center related to deformation |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
violet |
type Ia :
hydrogen-related defects |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
white |
type Ia : unknown inclusions |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
yellow |
type Ia :
aggregate of 3 nitrogen atoms, N3 |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
yellow |
type Ib : isolated nitrogen |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
yellow (treated) |
type Ia : N3 +
vacancies trapped at nitrogen aggregates (N3 + H3 and H4) |
The Nature of Diamonds,
George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter by
Emmanuel Fritsch) |
|
Diamond |
yellowish green |
type Ia : fluorescence, H3 |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
|
Diamond |
yellowish orange
to pure orange |
type Ia:
unknown, nitrogen related, "480nm band" |
The Nature of
Diamonds, George E. Harlow, Cambridge University Press, 1997, p23-47 (chapter
by Emmanuel Fritsch) |
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
actinoliet |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
apatite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
barite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
calcite |
Diamond |
The Australian Gemmologist 2003 Vol21, N°9,p357 |
|
chevkinite |
Diamond |
Gems & Gemology Summer 2001 p132 |
|
chlorite |
Diamond |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
chromite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
coesite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
cubanite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
diamond |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
diopside |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
enstatite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
ferropericlase |
Diamond |
Gems & Gemology 2016 Winter, p423-424 |
|
fluorite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
forsterite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
goethite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
graphite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
hematite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
hornblende |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
ilmenite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
iron |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
kaolinite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
kyanite |
Diamond |
The Journal of Gemmology
1998, Vol 26, N°4, p222-225 |
|
loparite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
magnetite |
Diamond |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
melilite |
Diamond |
The Australian Gemmologist 2003 Vol21, N°9,p357 |
|
moissanite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
molybdenite |
Diamond |
The Australian Gemmologist 2003 Vol21, N°9,p357 |
|
olivine |
Diamond |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 3 |
|
omphacite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
pentlandite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
picotite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
pyrite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
pyrope |
Diamond |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
pyrrhotite |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
quartz |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
ruby |
Diamond |
Gems & Gemology Volume
17, Number 3 / Fall 1981 |
|
rutile |
Diamond |
Internal World of Gemstones,
Gübelin, 1983 |
|
sanidine |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
sapphire |
Diamond |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
sellaite |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
staurolite |
Diamond |
The MicroWorld of Diamonds,
Koivula, 2000 |
|
titanite |
Diamond |
The Australian Gemmologist 2003 Vol21, N°9,p357 |
|
walstronite |
Diamond |
Gems & Gemology 2018, Summer, p 242 |
|
xenotime |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
|
zircon |
Diamond |
Dr. W.F. Eppler, Praktische Gemmologie, 1984. |
LOCALITIES
|
Diamond |
Camutue mine |
|
Lunda Norte Province |
Angola |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Camafuca-Camazambo Mine |
Calonda area |
Lunda Norte Province |
Angola |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Catoca mine |
Catoca kimberlite field |
Lunda Sul Province |
Angola |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Gareth pipe |
Merlin project |
Northern Territory |
Australia |
Gems & Gemology 2003 Fall p222 |
|
Diamond |
Ellendale field |
Kimberley Region |
Western Australia |
Australia |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Lake Argyle area |
Wyndham-East Kimberley Shire |
Western Australia |
Australia |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Letlhakane Mine |
Letlhakane |
Central District |
Botswana |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Orapa Mine |
Orapa |
Central District |
Botswana |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Jwaneng Mine |
Kanye |
Southern District |
Botswana |
Lapis 1994/11 |
|
Diamond |
|
Chapada Diamantina |
Bahia |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Diamantino-Alto Paraguai District |
Mato Grosso |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Nortelandia |
Mato Grosso |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Poxoréo |
Mato Grosso |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Diamantina |
Minas Gerais |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Rio Tocantin river |
Para |
Brazil |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Snap Lake project |
Camsell Lake |
Northwest Territories |
Canada |
Rocks & Minerals 81:278-283 |
|
Diamond |
Jericho kimberlite pipe |
Contwoyto Lake |
Northwest Territories |
Canada |
Journal of Petrology 40:79-104 |
|
Diamond |
Diavik Mine |
Lac de Gras |
Northwest Territories |
Canada |
Rocks & Minerals 81:278-283 |
|
Diamond |
Ekati Mine |
Lac de Gras |
Northwest Territories |
Canada |
Rocks & Minerals 81:278-283 |
|
Diamond |
|
Birim diamond field |
Eastern Region |
Ghana |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Aredor Mine |
Gbenko |
|
Guinea |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Mazaruni river |
Imbaimadai |
Cuyuni-Mazaruni |
Guyana |
Fleischer, R. (1998): Mineralium Deposita 33,
238-254. |
|
Diamond |
Golconda Mines, Golconda |
Hyderabad District |
Andhra Pradesh |
India |
Lapis 1994/11 |
|
Diamond |
|
|
Kalimantan Island (Borneo Island) |
Indonesia |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Kao kimberlite pipe |
|
Buthe Buthe district |
Lesotho |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Elizabeth Bay Mine |
Lüderitz District |
|
Namibia |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
|
Orange River mining area |
Karas Region |
Namibia |
Gems & Gemology 1990 Spring p24 |
|
Diamant |
Lomonosov pipe, Zolotitsa
occurrence, Zimny Bereg kimberlite field |
Zimny Bereg District |
Arkhangel'skaja Oblast' |
Russia |
Gems & Gemology Summer 2017 p144-164 |
|
Diamond |
Mir (Myr) Pipe, Mirny |
Saha (Sakha) Republic (Yakutia) |
Siberia |
Russia |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Udachnaya-Vostochnaya pipe,
Daldyn, Daldyn-Alakit kimberlite field |
Saha (Sakha) Republic (Yakutia) |
Siberia |
Russia |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Zarnitsa pipe, Daldyn,
Daldyn-Alakit kimberlite field |
Saha (Sakha) Republic (Yakutia) |
Siberia |
Russia |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Aikhal |
Yakutia |
Siberia |
Russia |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Koffiefontein Mine |
Koffiefontein |
Free State |
South Africa |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Premier mine |
Cullinan, Kimberley |
Gauteng |
South Africa |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
De Beers diamond mine |
Kimberley |
Northern Cape |
South Africa |
Minerals of South Africa,
Bruce Cairncross-Roger Dixon, Geological Society of South Africa, 1995 |
|
Diamond |
Finsch mine |
|
Northern Cape Province |
South Africa |
The Nature of Diamonds (Harlow)The
Nature of Diamonds (Harlow), 1997 |
|
Diamond |
Roberts Victor Mine |
Boshof |
Orange Free State |
South Africa |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Jagersfontein kimberlite |
Jagersfontein |
Orange Free State |
South Africa |
The Journal of Gemmology ,
1984, XIX, 4, p353 |
|
Diamond |
Dokolwayo Mine |
Dokolwayo |
Lubombo District |
Swaziland |
Gems & Gemology 1990 Spring p24 |
|
Diamond |
Mwadui Mine (Williamson Mine) |
Mwadui |
Tabora Region |
Tanzania |
Mineralogical Record 1/2004 |
|
Diamond |
|
Guaniamo |
Bolivar |
Venezuela |
Gems & Gemology 1990 Spring p24 |
CHEMICAL DATA