|
INVESTIGATIONS
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Locality |
Info |
Spectrum |
UVS |
UVL |
Reference |
Pyrope |
1,717 |
1,73 |
3,58 |
3,67 |
pale purple to purplish
pink, with very low to moderate saturation |
Dora Maira Massif, Italy |
|
|
|
|
Gems & Gemology 2001
fall p198-204 |
Pyrope |
1,73 |
1,73 |
3,73 |
3,73 |
purplish red |
Umba Valley, Tanga
Region, Tanzania |
3.87ct |
broad absorption below
405nm; lines at 435, 500, 525, 575nm |
inert |
inert |
GIA Gem Database 33229 |
Pyrope |
1,73 |
1,73 |
|
|
|
|
0.18ct, composition: Prp79Alm12Grs9 |
|
|
|
Gems & Gemology 2011
Winter, p274 |
Pyrope |
1,735 |
1,735 |
3,69 |
3,69 |
pale brownish pink |
Tunduru, Tanzania |
3.14 ct |
absorption below 430 nm,
and lines at 505, 527,and about 576 nm |
inert |
faint red |
Gems & Gemology 1996
Summer, p124-125 |
Pyrope |
1,737 |
1,737 |
3,738 |
3,738 |
light pink |
|
2.46ct |
line 432nm, band
490-505nm, lines at 525 and 570nm, weak Cr lines at 650 and 670nm |
inert |
inert |
The Journal of Gemmology
1984 Vol XIX, N°4, p311 |
Pyrope |
1,74 |
1,74 |
3,72 |
3,72 |
almost black, dark brown |
|
cabochon, numerous black
ilmenite inclusions |
general absorption up to
about 480 nm and again above 620 nm. |
|
|
Gems & Gemology 1988
Summer, p116 |
Pyrope |
1,741 |
1,741 |
3,77 |
3,77 |
pink |
|
7,62ct |
|
|
|
Gems & Gemology 2023
Spring, p73 |
Cr Pyrope |
1,742 |
1,742 |
3,72 |
3,72 |
|
|
5.37ct, Prp58Grs22Alm16 |
|
|
|
Gems & Gemology 2011
Winter, p274 |
Pyrope |
1,743 |
1,743 |
3,76 |
3,76 |
red |
Garnet Ridge, Arizona |
3.76ct |
|
inert |
inert |
ACAM lab 2122 |
Cr Pyrope |
1,744 |
1,744 |
3,7 |
3,7 |
|
|
1.96ct, composition:
Grs57Prp27Alm16 |
|
|
|
Gems & Gemology 2011
Winter, p274 |
Pyrope |
1,744 |
1,744 |
3,77 |
3,77 |
|
|
1.27ct, composition:
Prp74Alm25Sps1 |
|
|
|
Gems & Gemology 2011
Winter, p274 |
Pyrope |
1,745 |
1,745 |
3,79 |
3,79 |
pink-violet |
|
0.63ct |
|
|
|
ACAM lab 2149 |
Pyrope |
1,748 |
1,75 |
|
|
fire red |
Podsedice, 10km south of
Lovosice, Bohemia, Czech Republic |
currently (1991) mined
:very small stones, average 0.25ct |
|
|
|
Gems & Gemology 1991
Fall, p171-173 |
Pyrope |
1,757 |
1,757 |
3,84 |
3,84 |
dark orangy red |
Umba Valley, Tanzania |
11.45ct |
broad absorption below
430nm, lines at 460, 480, 500, 570nm |
inert |
inert |
GIA Gem Database 33313 |
TABLES
Stone |
RI
min |
RI
max |
Dens
min |
Dens
max |
Reference |
Pyrope |
1.705 |
1.766 |
3.51 |
3.9 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Pyrope |
1.71 |
1.742 |
3.67 |
3.8 |
http://www.geminterest.com |
Pyrope |
1.713 |
1.75 |
3.55 |
3.85 |
Gemmo.eu
|
Pyrope |
1.714 |
1.742 |
3.65 |
3.8 |
Tables of
Gemstone Identification, Roger Dedeyn, Ivo Quintens, 2007 |
Pyrope |
1.72 |
1.756 |
3.62 |
3.87 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Pyrope |
1.72 |
1.756 |
3.65 |
3.9 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Pyrope |
1.72 |
1.756 |
3.62 |
3.87 |
Gemology Tools Professional 2010 |
Pyrope |
1.73 |
1.766 |
3.65 |
3.87 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
Pyrope |
1.73 |
1.75 |
3.65 |
3.8 |
Gemmological Tables, Ulrich Henn,
2004 |
Pyrope |
1.73 |
1.75 |
3.65 |
3.8 |
John Sinkakas,
Gemstone and mineral data book,1972 |
Pyrope |
1.73 |
1.75 |
3.65 |
3.7 |
Gems, R Webster,
5th edition 1994 |
Pyrope |
1.732 |
1.75 |
3.65 |
3.8 |
http://www.gemmology.be |
Pyrope |
1.732 |
1.75 |
3.65 |
3.8 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Pyrope |
brownish red |
Fe²+ in
distorted cubic coordination |
Gems & Gemology Summer 1988 |
Pyrope |
colour change |
V³+ and/or Cr³+
in octahedral coordination |
Gems & Gemology Summer 1988 |
Pyrope |
red |
Fe²+ in
distorted cubic coordination and Cr³+ in octahedral coordination |
Gems & Gemology Summer 1988 |
Pyrope |
red-orange |
Mn²+ in distorted
cubic coordination |
Mr. Dominique Flies, La couleur des
grenats, l’Université de Nantes, 2008 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
apatite |
Pyrope |
Gemmological
Tables, Ulrich Henn , GGA, 2004 |
chromite |
Pyrope |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
diamond |
Pyrope |
Mineralogical Record, 24 (1) 1993 p64 |
diopside |
Pyrope |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
forsterite |
Pyrope |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
ilmenite |
Pyrope |
E.J. Gübelin and
J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
rutile |
Pyrope |
www.geminterest.com |
zircon |
Pyrope |
www.geminterest.com |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Pyrope |
|
Shuangyashan Prefecture |
Heilongjiang Province |
China |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Trebenice |
Bohemia |
Czech Republic |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
Pyrope |
|
Bhadrachalam |
Andhra Pradesh |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Angul |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Balangir |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Deogarh |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Kalahandi |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Koraput |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Phulabani |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Sambalpur |
Orissa |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Bendrie |
Rajasthan (Rajputana) |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Kakaoria |
Rajasthan (Rajputana) |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Sangwa |
Rajasthan (Rajputana) |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Sarwad |
Rajasthan (Rajputana) |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Udaipur |
Rajasthan (Rajputana) |
India |
Gems & Gemology Fall 2010, p209 |
Pyrope |
Dora Maira Massif |
Parigi |
Martiniana Po, Piemonte |
Italy |
Geïllustreerde Mineralen Encyclopedie,
Petr Korbel & Milan Novak, 2001 |
Pyrope |
|
Marolambo |
Toamasina (Tamatave) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Ampahiny |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Antaratra |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Bekily District |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Fotodrevo |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Sakoandroa |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Tranoroa |
Tuléar (Toliara) Province |
Madagascar |
Gems & Gemology Fall 2010, p209 |
Pyrope |
Shavaryn Tsaram, Tariat |
Hangai highland |
Arhangay Aimag |
Mongolia |
Gems & Gemology Fall 2010, p209 |
Pyrope |
Udachnaya-Vostochnaya
pipe, Daldyn, Daldyn-Alakit kimberlite field |
Saha (Sakha) Republic (Yakutia) |
Siberia |
Russia |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
|
|
Somaliland |
The Journal of
Gemmology, 2000, Vol27, N°3, p148 |
Pyrope |
Umba Valley |
Lelatema Mts |
Arusha Region |
Tanzania |
Gemmologie, 1997, Mar,p31 |
Pyrope |
|
Namaputa |
Lindi Province |
Tanzania |
Gemmologie, 1997, Mar,p31 |
Pyrope |
|
|
Lindi Region |
Tanzania |
Gems & Gemology Fall 2010, p209 |
Pyrope |
|
Tunduru-Songea area |
Ruvuma Region |
Tanzania |
Gemmologie, 1997, Mar,p31 |
Pyrope |
|
Sangu |
Eastern Province |
Zambia |
Gems & Gemology Fall 2010, p209 |
CHEMICAL DATA
(%)
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
Na2O |
Cr2O3 |
V2O3 |
Fe2O3 |
K2O |
|
Pyrope |
purplish pink |
Dora Maira Massif |
Italy |
Gems & Gemology 2001 Fall p204 |
44.46 |
26.07 |
0.02 |
27.97 |
1.48 |
0.02 |
0.59 |
|
|
|
|
|
Pyrope |
purplish pink |
Dora Maira Massif |
Italy |
Gems & Gemology 2001 Fall p204 |
44.13 |
25.81 |
0.05 |
27.16 |
2.5 |
0.01 |
0.61 |
|
|
|
|
|
Pyrope |
red |
Podsedice, Bohemia |
Czech Republic |
Gems & Gemology 1991 Fall, p173 |
41.46 |
21.51 |
0.32 |
21.29 |
9.17 |
0.7 |
4.45 |
|
1.66 |
0.09 |
|
|
Pyrope |
red |
Podsedice, Bohemia |
Czech Republic |
Gems & Gemology 1991 Fall, p173 |
41.06 |
21.39 |
0.31 |
20.82 |
9.1 |
0.55 |
4.48 |
|
1.76 |
0.05 |
|
|
Pyrope |
purplish pink |
Dora Maira Massif |
Italy |
Gems & Gemology 2001 Fall p204 |
44.02 |
25.72 |
0.05 |
26.41 |
3.33 |
0.04 |
0.94 |
|
|
|
|
|
Pyrope |
red |
|
Somaliland |
The Journal of
Gemmology 2000, Vol27, N°3,p148 |
41.79 |
23.28 |
0.27 |
17.95 |
9.54 |
0.06 |
6.3 |
|
0.09 |
|
0.35 |
|
Pyrope |
red |
Arizona |
USA |
The Journal of Gemmology
2007,30,5/6,307-319 |
40.81 |
23.07 |
0.34 |
20.49 |
7.03 |
0.21 |
3.81 |
0.04 |
1.41 |
|
3 |
0.01 |
Pyrope |
light pink |
|
|
The Journal of
Gemmology 1984, XIX, 4, p312 |
45.2 |
25.33 |
|
28.5 |
|
|
|
|
|
|
|
|