|
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 |
|
Zircon - low |
1,782 |
1,782 |
|
|
3,922 |
3,922 |
very dark green |
Sri Lanka |
metamict |
|
|
|
|
|
|
|
The Journal of Gemmology
1974 N°4, p168-169 |
|
Zircon |
|
|
|
|
4 |
4 |
yellowish green |
Ilakaka, Fianarantsoa,
Madagascar |
2.01ct |
|
|
|
|
broad absorption below
430nm and above 650nm |
inert |
inert |
GIA Gem Database 35605 |
|
Zircon |
1,83 |
1,838 |
0,006 |
0,008 |
4,04 |
4,06 |
brown, green, yellow,
reddish brown, yellowish brown |
Elahera, Sri Lanka |
|
|
|
|
|
653, many lines |
weak to distinct greenish
yellow |
weak to distinct
yellowish |
Gems & Gemology 1986 Summer,
p91 |
|
Zircon |
1,83 |
1,83 |
|
|
4,04 |
4,04 |
light brown |
Bibilé, Sri Lanka |
cat's-eye |
|
|
|
|
660, 653, 621, 589 nm |
|
|
The Journal of Gemmology
1988 Vol 21, N°2, p88-91 |
|
Zircon |
|
|
|
|
4,07 |
4,04 |
yellowish green |
Sabaragamuwa Province,
Sri Lanka |
7.11ct |
|
|
|
|
broad absorption below
430nm and above 660nm; line at 520nm |
inert |
inert |
GIA Gem Database 33717 |
|
Zircon |
|
|
|
|
4,12 |
4,12 |
yellowish green |
Sabaragamuwa Province,
Sri Lanka |
6.21ct |
|
|
|
|
broad absorption below
430nm ; lines at 485, 518, 539, 589, 653nm |
inert |
inert |
GIA Gem Database 33734 |
|
Zircon |
|
|
|
|
4,15 |
4,15 |
brown with PLAY of COLOUR
(green and red) |
|
|
|
|
|
|
|
weak slightly chalky |
inert |
Gems & Gemology 1997
summer, p141 |
|
Zircon |
1,922 |
1,983 |
0,06 |
0,06 |
4,334 |
4,654 |
colourless |
Champassak district,
Thailand |
heat treated |
1,982 |
1,983 |
1,922 |
1,923 |
653nm line or doublet |
inert or orange |
orange |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,52 |
4,52 |
blue (heated) |
Maripa, Malawi |
RI>1.81 |
|
|
|
|
sharp 654 line |
inert |
inert |
Gems & Gemology 2021
winter, p405 |
|
Zircon |
|
|
|
|
4,53 |
4,53 |
yellowish-brown |
Sri Lanka |
24.92 ct, aventurescence
caused by reflection of light at very thin and partly circular cracks |
|
|
|
|
|
|
|
Gemmologie, Zeitschrift
der Deutschen Gemmologischen Gesellschaft 1996 Dec, p153 |
|
Zircon |
|
|
|
|
4,54 |
4,54 |
greenish brown |
Sri Lanka |
|
|
|
|
|
absorption lines in the
red |
|
|
Gemmologie, Zeitschrift
der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169 |
|
Zircon |
|
|
|
|
4,55 |
4,55 |
dark orange |
Tunduru, Ruvuma Region,
Tanzania |
8.74ct |
|
|
|
|
broad absorption below
420nm and above 670nm |
weak orangy yellow |
inert |
GIA Gem Database 33756 |
|
Zircon |
1,922 |
1,982 |
0,06 |
0,06 |
4,555 |
4,555 |
golden |
Kha district, Vietnam |
heat treated |
|
|
|
|
653nm line, general
absorption of blue and violet |
mustard |
inert |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,57 |
4,69 |
brownish red |
Muling, China |
high zircon |
|
|
|
|
some faint lines below
600nm |
|
|
Gems & Gemology 2011
Spring, p36-41 |
|
Zircon |
|
|
|
|
4,57 |
4,69 |
brownish red |
Muling, China |
high zircon |
|
|
|
|
some faint lines below
600nm |
|
|
Gems & Gemology 2011
Spring, p36-41 |
|
Zircon |
1,922 |
1,984 |
0,056 |
0,061 |
4,593 |
4,657 |
colourless |
Kha district, Vietnam |
heat treated |
1,979 |
1,984 |
1,922 |
1,923 |
653nm line |
inert |
mustard |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
1,92 |
1,97 |
|
|
4,6 |
4,69 |
whitish-grey |
Sri Lanka |
heat-treated cat's-eye |
|
|
|
|
660, 691, 662, 653, 621,
615, 589, 562, 538, 516nm |
|
|
The Journal of Gemmology
1988 Vol 21, N°2, p88-91 |
|
Zircon |
|
|
|
|
4,62 |
4,72 |
pink, purple,
yellow-brown, orangy brown, near colourless (heat treated) |
|
|
|
|
|
|
prominent 653nm, weak
bands 535, 590,657, 689 |
moderate to very strong:
yellow, brownish yellow, yellowish orange |
weak to strong:
yellowish, brownish yellow, yellowish orange |
Gems & Gemology 1989
winter p207-215 |
|
Zircon |
|
|
|
|
4,64 |
4,64 |
orangy yellow |
Mount Meru, Arusha,
Tanzania |
12.81ct |
|
|
|
|
broad absorption below
420nm ; lines at 437, 485, 518, 539,
562, 589, 653, 690nm |
inert |
inert |
GIA Gem Database 34341 |
|
Zircon |
1,921 |
1,982 |
0,061 |
0,061 |
4,649 |
4,649 |
pale brown |
Pailin district, Cambodia |
|
|
|
|
|
no visible spectrum |
orange |
orange |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,65 |
4,69 |
brown to brownish red |
Cambodia |
|
|
|
|
|
653nm line |
inert |
inert |
The Australian
Gemmologist 2011 Apr-Jun, p150 |
|
Zircon |
1,923 |
1,983 |
0,06 |
0,06 |
4,67 |
4,67 |
strong gold |
Kha district, Vietnam |
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
1,946 |
1,946 |
|
|
4,67 |
4,67 |
colourless |
|
RI reading gemmeter;
1.1ct |
|
|
|
|
|
|
|
ACAM Lab |
|
Zircon |
1,957 |
1,962 |
|
|
4,67 |
4,72 |
brown, yellow-brown,
yellow, red, brownish pink pink, pinkish brown |
Bombo River, Umba valley,
Tanzania |
|
|
|
|
|
690, 682, 653, 620, 615,
589, 562, 538, 510nm |
distinct to strong brown |
weak to strong brown |
The Australian
Gemmologist 2009 Vol 23, N°10, p453-456 |
|
Zircon |
1,922 |
1,982 |
0,06 |
0,06 |
4,679 |
4,679 |
red |
Champassak district,
Thailand |
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,68 |
4,68 |
greenish yellow |
Ilakaka, Fianarantsoa,
Madagascar |
7.66ct |
|
|
|
|
broad absorption below
420nm ; lines at 477, 485, 513, 518, 539, 543, 562, 589, 615, 621, 653, 660,
690nm |
inert |
inert |
GIA Gem Database 35601 |
|
Zircon |
|
|
|
|
4,68 |
4,68 |
greenish blue |
Thailand |
28.15ct |
|
|
|
|
broad absorption below
420nm ; lines at 543, 596, 660nm |
inert |
inert |
GIA Gem Database 33695 |
|
Zircon |
1,923 |
1,985 |
0,062 |
0,062 |
4,68 |
4,68 |
colour changing : blue in
daylight to green in incandescent light |
|
2.25ct |
|
|
|
|
strong uranium spectrum |
inert |
inert |
Gems & Gemology 1995
Fall, p212-213 |
|
Zircon |
|
|
|
|
4,68 |
4,68 |
greenish blue |
|
6,54ct, strong
birefringence; colour change under UVL (photochromic) from greenish blue to very dark yellowish green |
|
|
|
|
|
|
|
Gems & Gemology 2022
Summer, 252 |
|
Zircon |
1,922 |
1,982 |
0,06 |
0,06 |
4,695 |
4,695 |
orangy-white |
Champassak district,
Thailand |
heat treated |
|
|
|
|
653nm line |
inert |
orange |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,7 |
4,7 |
reddish brown |
Yabelo, Ethiopia |
13.01ct |
|
|
|
|
|
weak orange with yellow
chalkiness |
|
Gems & Gemology 2011
Fall, p247 |
|
Zircon |
|
|
|
|
4,7 |
4,7 |
dark orange |
Dodoma Region, Tanzania |
21.05ct |
|
|
|
|
broad absorption below
430nm |
inert |
inert |
GIA Gem Database 35070 |
|
Zircon |
|
|
|
|
4,7 |
4,7 |
light yellowish orange |
Thailand |
11.48ct |
|
|
|
|
broad absorption below
above 670nm; lines at 485, 518, 539, 562, 589, 615, 653, 657nm |
weak greenish blue |
weak orangy yellow |
GIA Gem Database 33719 |
|
Zircon |
|
|
|
|
4,7 |
4,7 |
yellowish orange |
Thailand |
15.13ct |
|
|
|
|
broad absorption below
440nm and above 660nm |
inert |
inert |
GIA Gem Database 35092 |
|
Zircon |
|
|
|
|
4,7 |
4,7 |
greenish blue |
Thailand |
19.31ct |
|
|
|
|
broad absorption below
430nm and above 660nm; lines at 518, 539, 562, 589, 653nm |
inert |
inert |
GIA Gem Database 33746 |
|
Zircon |
|
|
|
|
4,71 |
4,71 |
colourless |
Sri Lanka |
4.54ct |
|
|
|
|
many absorption lines |
|
|
Gemmologie, Zeitschrift
der Deutschen Gemmologischen Gesellschaft 1999 Jul p106 |
|
Zircon |
|
|
|
|
4,71 |
4,72 |
colourless |
Solomon Islands |
0.79 - 2.50 ct |
|
|
|
|
two lines in the red
region, stronger at 653.5 nm |
moderate white |
moderate yellowish orange |
Gems & Gemology 2010
spring, p67 |
|
Zircon |
1,923 |
1,969 |
0,046 |
0,046 |
4,719 |
4,719 |
mid blue |
Kha district, Vietnam |
heat treated |
|
|
|
|
653nm line |
inert |
inert |
The Journal of Gemmology
1993 Vol23, N°7, p387-392 |
|
Zircon |
|
|
|
|
4,72 |
4,72 |
orange |
Australia |
1.80ct, tenebrescent |
|
|
|
|
|
|
|
Gems & Gemology 2011
Winter, p314-315 |
|
Zircon |
|
|
|
|
4,75 |
4,75 |
orange |
Thailand |
4.06ct |
|
|
|
|
broad absorption below
440nm and above 660nm |
inert |
inert |
GIA Gem Database 35091 |
|
Zircon |
1,87 |
1,87 |
|
|
4,75 |
4,75 |
greenish-blue (strong sky
blue) |
Cambodia |
heated, 6.19ct, RI
mesured by reflectivity, doubled facets edges can be easily observed |
|
|
|
|
|
inert |
inert |
http://www.spec4gem.info/index.php
2015 |
|
Zircon |
|
|
|
|
4,79 |
4,79 |
reddish orange |
Cambodia |
6.61ct |
|
|
|
|
broad absorption below
430nm and above 670nm |
inert |
inert |
GIA Gem Database 33723 |
|
Zircon |
|
|
|
|
|
|
brownish reddish orange |
Myanmar |
21.87ct |
|
|
|
|
numerous lines: 432, 484,
521, 537, 562, 589, 660, 662 and 691 nm |
weak orange |
weak orange |
The Journal of Gemmology
2015 Vol 34, No.5, p397 |
TABLES
|
Stone |
RI
min |
RI
max |
Biref
min |
Biref
max |
Dens
min |
Dens
max |
ne
min |
ne
max |
no
min |
no
max |
Reference |
|
Zircon |
1.777 |
2.01 |
0 |
0.059 |
3.9 |
4.8 |
|
|
|
|
http://www.gemmology.be |
|
Zircon - low |
1.777 |
1.85 |
|
|
3.9 |
4.1 |
|
|
|
|
http://www.geminterest.com |
|
Zircon - low |
1.777 |
1.781 |
|
0.004 |
3.9 |
4.1 |
|
|
|
|
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Zircon - low |
1.78 |
1.85 |
|
0.008 |
3.9 |
4.1 |
1.780 |
1.850 |
1.780 |
1.850 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Zircon - low |
1.78 |
1.78 |
0.005 |
0.005 |
3.95 |
4.1 |
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Zircon - low |
1.78 |
1.81 |
|
|
3.95 |
4.1 |
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
|
Zircon - low |
1.78 |
1.81 |
|
|
3.9 |
4.1 |
|
|
|
|
Gems, R Webster,
5th edition 1994 |
|
Zircon - low |
1.78 |
1.84 |
0.002 |
0.005 |
3.93 |
4.07 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
|
Zircon |
1.78 |
2.024 |
0 |
0.059 |
3.9 |
4.73 |
|
|
|
|
Gemology Tools Professional 2010 |
|
Zircon - low |
1.78 |
1.85 |
0 |
0.008 |
3.9 |
4.1 |
|
|
|
|
Gemology Tools Professional 2010 |
|
Zircon - low |
1.78 |
1.85 |
0.001 |
0.003 |
3.87 |
4.1 |
|
|
|
|
Gemmo.eu 2013 |
|
Zircon - low |
1.785 |
1.848 |
0.001 |
0.008 |
3.9 |
4 |
1.780 |
1.848 |
1.785 |
1.850 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Zircon |
1.79 |
2.015 |
0.005 |
0.055 |
3.91 |
4.73 |
1.795 |
2.015 |
1.790 |
1.960 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Zircon - medium |
1.84 |
1.97 |
0.008 |
0.043 |
4.1 |
4.65 |
1.850 |
1.970 |
1.840 |
1.930 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Zircon - medium |
1.846 |
1.97 |
0.006 |
0.043 |
4.08 |
4.65 |
1.850 |
1.970 |
1.846 |
1.930 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Zircon - medium |
1.85 |
1.945 |
0.006 |
0.05 |
4.07 |
4.65 |
1.865 |
1.945 |
1.850 |
1.920 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Zircon - high |
1.864 |
2.015 |
0.036 |
0.059 |
4.64 |
4.7 |
1.970 |
2.015 |
1.864 |
1.970 |
http://www.geminterest.com |
|
Zircon - medium |
1.875 |
1.935 |
0.006 |
0.05 |
4.07 |
4.57 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Zircon - high |
1.92 |
2.01 |
0.036 |
0.059 |
4.65 |
4.8 |
1.970 |
2.010 |
1.920 |
1.940 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Zircon - high |
1.923 |
2.024 |
0.36 |
0.059 |
4.65 |
4.8 |
1.944 |
2.024 |
1.920 |
1.940 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Zircon - high |
1.923 |
2.01 |
0.04 |
0.06 |
4.5 |
4.75 |
|
|
|
|
Gemmo.eu 2013 |
|
Zircon - high |
1.925 |
2.024 |
0.059 |
0.059 |
4.67 |
4.73 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Zircon - high |
1.925 |
1.984 |
0.059 |
0.059 |
4.67 |
4.7 |
|
|
|
|
Gems, R Webster,
5th edition 1994 |
|
Zircon - high |
1.925 |
2.01 |
0.036 |
0.059 |
4.65 |
4.8 |
1.970 |
2.010 |
1.925 |
1.940 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Zircon - high |
1.926 |
1.985 |
0.059 |
0.059 |
4.67 |
4.71 |
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Zircon - medium |
|
|
|
|
4.1 |
4.6 |
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
|
Zircon - high |
|
|
0.059 |
0.059 |
4.67 |
4.7 |
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Zircon |
blue |
U4+ |
Gems & Gemology Summer 1988 |
|
Zircon |
brown |
presence of
small amounts of uranium and thorium |
Gems & Gemology Summer 1981 p65 |
|
Zircon |
brown, amber |
radioactive
decay and the resulting radiation damage centers |
http://minerals.caltech.edu |
|
Zircon |
green |
associated with
a mixture of the blue color from uranium and red-brown color from radiation
damage centers |
http://minerals.caltech.edu |
|
Zircon |
red |
Nb4+ colour centers |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
actinolite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
apatite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
biotite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
goethite |
Zircon |
The Journal of
Gemmology, 1993, Vol23, N°7, p390 |
|
hematite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
ilmenite |
Zircon |
Webster, Gems
5th edition, p181 (1994) |
|
limonite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
magnetite |
Zircon |
Gems & Gemology 2011, Spring, p39 |
|
pyrite |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
|
rutile |
Zircon |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Zirkoon |
|
|
Rattanakiri province |
Cambodia |
The Journal of Gemmology
2018, Vol 36 (2), p112-129 |
|
Zircon |
Antanifotsy pegmatite, Faratsiho Department |
Vakinankaratra Region (Betafo - Antsirabé region) |
Antananarivo Province |
Madagascar |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Departementa Betroka |
Horombe region |
Fianarantsoa Province |
Madagascar |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Ilakaka gem deposit, Ilakaka, Departementa Ranohira |
Horombe region |
Fianarantsoa Province |
Madagascar |
Extra Lapis No 17 |
|
Zircon |
Amboasary Department |
Anosy (Fort Dauphin) Region |
Tuléar (Toliara ) Province |
Madagascar |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Jemaa |
Kaduna |
|
Nigeria |
http://www.keysminerals.com/africa.html |
|
Zircon |
|
Haputale |
Badulla |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Passara |
Badulla |
Central Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Avissawella |
Kegalla |
Central Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Hatton |
Nuwara Elyia |
Central Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Elahera |
Polonnaruwa |
Central Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Balangoda |
Ratnapura |
Sabaragamuwa province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Pelmadulla |
Ratnapura |
Sabaragamuwa province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Rakwana |
Ratnapura |
Sabaragamuwa Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Alutgama |
Kalutara |
Southern Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Akuressa |
Matara |
Southern Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Morawaka |
Matara |
Southern Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Embilipitiya |
Monaragata |
Southern Province |
Sri Lanka |
Gems & Gemology 2000 winter p325 |
|
Zircon |
Umba Valley |
Lelatema Mts |
Arusha Region |
Tanzania |
Gemmologie, 1997, Mar,p31 |
|
Zircon |
|
Same |
Kilimanjaro Region |
Tanzania |
Gems & Gemology 2000 winter p325 |
|
Zircon |
|
Mashewa |
Korogwe area |
Tanzania |
The Australian Gemmologist 2009 Vol23, N°10 p453-456 |
|
Zircon |
|
Tunduru-Songea area |
Ruvuma Region |
Tanzania |
Gemmologie, 1997, Mar,p31 |
|
Zircon |
|
|
Singida Region |
Tanzania |
The Australian Gemmologist 2009 Vol23, N°10 p456-456 |
|
Zircon |
|
|
Tanga Province |
Tanzania |
The Australian Gemmologist 2009 Vol23, N°10 p453-456 |
|
Zircon |
Bombo river area |
Umba River (Umba Valley) |
Tanga Region |
Tanzania |
The Australian Gemmologist 2009 Vol23, N°10 p456-456 |
|
Zircon |
|
Muhuwesi River |
Tunduru |
Tanzania |
Gems & Gemology 2000 winter p325 |
|
Zircon |
|
Champassak district |
|
Thailand |
Webster, Gems 5th edition
(1994), p182 |
|
Zircon |
|
Kha District |
|
Vietnam |
Webster, Gems 5th edition
(1994), p182 |
CHEMICAL DATA
(%)
|
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
CaO |
Fe2O3 |
P2O5 |
PbO |
ZrO2 |
HfO2 |
ThO2 |
UO2 |
|
|
Zircon |
blue |
Ratanakiri Province |
Cambodia |
The Journal of Gemmology,
2018, Vol 36 (2), p122 |
32.6 |
|
|
|
|
|
|
0.042 |
|
66.8 |
0.693 |
|
|
|
Zircon |
brownish red |
Muling |
China |
Gems & Gemology 2011, Spring, p40 |
33.14 |
0.05 |
|
0.03 |
|
0.03 |
|
|
|
63.75 |
1.16 |
|
|
|
Zircon |
red |
|
Nigeria |
The Journal of Gemmology
1990, Vol22, N°4,p201 |
33.2 |
0.02 |
|
|
|
0.3 |
0.12 |
|
|
65.3 |
1.23 |
|
|
|
Zircon |
orange |
|
Nigeria |
The Journal of Gemmology
1990, Vol22, N°4,p201 |
32.4 |
0.08 |
|
|
|
0.01 |
0.83 |
|
|
65.6 |
0.91 |
|
|
|
Zircon |
orange |
|
Nigeria |
The Journal of Gemmology
1990, Vol22, N°4,p201 |
31.8 |
0.09 |
|
|
|
0.01 |
0.37 |
|
|
65.3 |
0.85 |
|
|
|
Zircon |
near colourless |
|
Nigeria |
The Journal of Gemmology
1990, Vol22, N°4,p201 |
32.1 |
0.01 |
|
|
|
0.01 |
0.08 |
|
|
66.5 |
0.64 |
|
|
|
Zircon |
green |
|
Sri Lanka |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1985, 34, Nr1/2, p71 |
33.95 |
|
|
|
0.09 |
|
|
|
|
64.42 |
1.7 |
0.14 |
0.47 |
|
Zircon |
violet |
|
Sri Lanka |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1985, 34, Nr1/2, p71 |
34.27 |
|
|
|
0.03 |
|
|
|
|
65.72 |
1.19 |
0.1 |
0.12 |
|
Zircon |
yellow |
|
Sri Lanka |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1985, 34, Nr1/2, p71 |
33.52 |
|
|
|
0.03 |
|
|
|
|
65.18 |
1.4 |
0.08 |
0.16 |
|
Zircon |
pink |
|
Sri Lanka |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1985, 34, Nr1/2, p71 |
33.84 |
|
|
|
0.04 |
|
|
|
|
65.7 |
1.27 |
0.07 |
0.14 |
|
Zircon |
light brown, cat's-eye |
|
Sri Lanka |
The Journal of Gemmology
1988, Vol 21, N°2, p90 |
34.28 |
|
|
|
0.04 |
|
|
|
|
63.7 |
1.4 |
|
|
|
Zircon |
whitish-grey, cat's eye,
heat treated |
|
Sri Lanka |
The Journal of Gemmology
1988, Vol 21, N°2, p90 |
33.96 |
|
|
|
|
|
|
|
|
65.1 |
1.19 |
0.25 |
0.67 |
|
Zircon |
yellow |
Bombo River, Umba valley |
Tanzania |
The Australian Gemmologist 2009,Vol 23, N°10, p454 |
32.62 |
|
|
|
|
|
0.01 |
0.04 |
|
67.5 |
0.88 |
0.01 |
0.24 |
|
Zircon |
light brown |
Bombo River, Umba valley |
Tanzania |
The Australian Gemmologist 2009,Vol 23, N°10, p454 |
32.56 |
|
0.03 |
|
|
|
0.01 |
0.04 |
0.13 |
67.61 |
0.67 |
0.01 |
0.01 |
|
Zircon |
dark brown |
Bombo River, Umba valley |
Tanzania |
The Australian Gemmologist 2009,Vol 23, N°10, p454 |
32.7 |
|
|
|
|
0.02 |
0.02 |
0.04 |
0.01 |
67.22 |
0.85 |
0.01 |
0.01 |