|
INVESTIGATIONS
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
Fluorite |
1.425 |
1.445 |
3.17 |
3.19 |
green |
Diana Maria mine, Weardale,
Durham, England |
0.60ct, 2.07ct |
|
violetish blue |
strong violetish blue |
The Journal of Gemmology
2020 Vol 37 (2), p128-130 |
Fluorite |
1.429 |
1.429 |
3.15 |
3.15 |
green |
Penas Blancas, Colombia |
|
rare earth elements |
moderate blue-violet |
intens blue |
Revue de Gemmologie A.F.G. 2000 n°140, juillet p
21-25 |
Fluorite |
1.43 |
1.43 |
3.18 |
3.18 |
colour change blue daylight,
purple in incandescent light |
|
|
band in yellow orange |
|
|
Gems & Gemology 2006 summer, p173-174 |
Fluorite |
1.431 |
1.431 |
3.19 |
3.19 |
deep blue in daylight and
purple in incandescent light |
|
irradiated, 9.84ct, chelsea filter:
red |
570 nm band |
inert |
inert |
Gems & Gemology 2002 Summer, p186 |
Fluorite |
1.432 |
1.432 |
3.18 |
3.18 |
colour change : smoky-brown
to lilac |
India |
75,44 cts; anomalous birefringence |
|
|
|
Gemmologie, Zeitschrift der Deutschen Gemmologischen
Gesellschaft 2002 Mar, p52-54 |
Fluorite |
1.432 |
1.432 |
3.19 |
3.19 |
green |
|
2.28ct |
|
weak violet |
violet-blue |
ACAM lab 4669 |
Fluorite |
1.432 |
1.432 |
3.18 |
3.18 |
blue-green |
Germany |
12.54ct |
|
moderate violet |
strong violet |
ACAM lab 619 |
Fluorite |
1.432 |
1.432 |
3.2 |
3.2 |
colourless |
Namibia |
2.87ct |
no features |
very weak green |
weak violet |
GIA Gem Database
34020 |
Fluorite |
1.433 |
1.441 |
2.99 |
3.18 |
white, purple, light green,
light brown, purple |
Argentina |
carved figures |
|
purple to brown |
purple to brown |
Gems & Gemology 1977 Summer, p290-294 |
Fluorite |
1.434 |
1.434 |
3 |
3.25 |
colour change from deep blue
in daylight to violet in artificial light |
Clara mine, Wolfach, Germany |
|
|
weak blue-violet |
blue-violet |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1990 Sep, p169-172 |
Fluorite |
1.434 |
1.434 |
3.12 |
3.12 |
cubic violet zones inside
yellow to orangy areas |
near Klein Spitzkoppe, Namibia |
|
|
weak yellow |
inert |
Gems & Gemology 2011 Winter, p318-319 |
Fluorite |
1.434 |
1.434 |
3.16 |
3.16 |
colourless, reddish brown to
brownish red/pink, and pale blue-violet |
Guji zone, Ethiopia |
|
|
inert to strong green |
inert to moderate green |
Gems & Gemology 2007 Summer, p168 |
Fluorite |
1.434 |
1.434 |
3.18 |
3.18 |
bluish green |
Stak Nala, Pakistan |
17.98, 24.07 and 28.68ct |
|
strong greenish yellow |
weak yellowish 'mustard'green |
The Journal of Gemmology
2014 Vol 34,N°3, p192-193 |
Fluorite |
1.435 |
1.435 |
3.22 |
3.22 |
greenish blue |
Madagascar |
51.10ct |
broad absorption below 420 |
light green |
weak purple |
GIA Gem Database
34388 |
Fluorite |
1.435 |
1.435 |
3.2 |
3.2 |
orangy red |
Göschener Alp, Uri, Switzerland |
57.77ct |
|
inert |
inert |
GIA Gem Database
34989 |
Fluorite |
1.435 |
1.435 |
3.2 |
3.2 |
blue |
China |
2.92ct |
|
inert |
inert |
ACAM lab 2107 |
fluorite synthetic |
1.435 |
1.435 |
3.186 |
3.186 |
green |
|
|
fine band at 690nm and an an absorption from
630nm to 580nm, with further weak bands at about 530nm and 490nm |
inert |
inert |
The Journal of Gemmology
1970 N°4,p120 |
Fluorite |
1.435 |
1.435 |
3.19 |
3.19 |
bluish green |
Madagascar |
12.84ct |
|
weak blue |
weak violet |
GIA Gem Database
34410 |
Fluorite |
1.435 |
1.435 |
3.24 |
3.24 |
red orange |
Switzerland |
|
no features |
very weak red |
inert |
GIA Gem Database
34971 |
Fluorite |
1.436 |
1.437 |
3.19 |
3.19 |
bluish green, greenish blue |
Kandahar, Afghanistan |
chelsea : pink; transparent |
none |
very weak greenish blue |
weak blue |
Gems & Gemology 2002 spring p 95 |
Fluorite |
1.436 |
1.436 |
3.19 |
3.19 |
bluish green |
Okorusu Mine, Otjiwarongo
District, Namibia |
48.80ct |
|
inert |
inert |
GIA Gem Database
33143 |
Fluorite |
1.436 |
1.436 |
3.17 |
3.17 |
light pink |
Mont Blanc (France or Italy) |
2.60ct |
|
inert |
inert |
http://www.spec4gem.info/index.php 2017 |
Fluorite |
1.436 |
1.436 |
3.16 |
3.16 |
slightly bluish green |
Peñas Blancas mining area,
Boyacá Department, Colombia |
5.55ct |
|
weak violet-blue |
strong violet-blue |
http://www.spec4gem.info 2017 07/jul |
Fluorite |
1.436 |
1.436 |
3.19 |
3.19 |
bluish green |
Namibia |
48.80ct |
|
inert |
inert |
GIA Gem Database
33143 |
Fluorite |
1.436 |
1.436 |
3.19 |
3.19 |
colourless |
Sri Lanka |
29.94ct |
|
very weak yellow |
weak violet |
GIA Gem Database
34871 |
Fluorite |
1.436 |
1.436 |
3.18 |
3.18 |
greenish blue |
Illinois, USA |
23.74ct |
no features |
very weak violet |
weak violet |
GIA Gem Database
35153 |
Fluorite |
1.437 |
1.437 |
3.19 |
3.19 |
greenish blue |
Afghanistan |
42.95ct |
broad absorption below 430
and above 650nm |
inert |
weak purple |
GIA Gem Database
33150 |
Fluorite |
1.437 |
1.437 |
3.18 |
3.18 |
|
Vietnam |
29.05ct, angular patterns of
dark colour concentrations |
|
inert |
inert |
The Journal of Gemmology
2014 Vol 34,N°3, p194 |
Fluorite |
1.439 |
1.439 |
3.2 |
3.2 |
yellow |
USA |
47.62ct |
weak lines at 460 and 480nm |
weak yellow |
weak orange |
GIA Gem Database
33149 |
Fluorite |
1.439 |
1.439 |
3.19 |
3.19 |
emerald green |
Bihar, India |
3.99ct |
no features |
inert |
inert |
Gems & Gemology 2007 Spring, p56-57 |
fluorite synthetic |
1.44 |
1.44 |
3.181 |
3.181 |
red |
|
|
a sharp line at 565nm, many lines in the
yellow and green |
inert |
inert |
The Journal of Gemmology
1970 N°4,p120 |
fluorite synthetic |
1.44 |
1.44 |
3.197 |
3.197 |
colourless |
|
|
|
green |
yellow green |
The Journal of Gemmology
1970 N°4,p120 |
TABLES
Stone |
RI
min |
RI
max |
Dens
min |
Dens
max |
Reference |
Fluorite |
1.428 |
1.436 |
3.09 |
3.25 |
Gemmo.eu
|
synthetic fluorite |
1.43 |
1.45 |
3.18 |
3.21 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Fluorite |
1.432 |
1.434 |
3 |
3.25 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
Fluorite |
1.432 |
1.434 |
3 |
3.25 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Fluorite |
1.432 |
1.436 |
3.15 |
3.2 |
Gemmological Tables, Ulrich Henn,
2004 |
Fluorite |
1.432 |
1.435 |
3.18 |
3.18 |
http://www.gemmology.be |
Fluorite |
1.432 |
1.438 |
3.15 |
3.18 |
http://www.geminterest.com |
Fluorite |
1.433 |
1.435 |
3 |
3.36 |
Gemology Tools Professional 2010 |
Fluorite |
1.434 |
1.434 |
3.17 |
3.19 |
John Sinkakas,
Gemstone and mineral data book,1972 |
Fluorite |
1.434 |
1.434 |
3.17 |
3.19 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
Fluorite |
1.434 |
1.434 |
3.16 |
3.2 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Fluorite |
1.434 |
1.434 |
3.18 |
3.18 |
Gems, R Webster,
5th edition 1994 |
Fluorite |
1.434 |
1.448 |
3 |
3.25 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Fluorite |
blue |
F colour centers
and M-centers (two F-centers) |
Steffen, Farbe und Lumineszenz von
Mineralien, 2000 |
Fluorite |
colour-change |
Y³+-associated
colour center and Sm²+, with minor influence of a Ce³+ associated colour
center |
Gems & Gemology Summer 1988 |
Fluorite |
emerald green |
Sm²+ |
Gems & Gemology Summer 1988 |
Fluorite |
light blue |
Y³+ and F
vacancy + 2 electrons |
Gems & Gemology Summer 1988 |
Fluorite |
pink |
YO2
colour center (Y³+ + O³-2) |
Gems & Gemology Summer 1988 |
Fluorite |
violet |
Mie scattering
on calcium microcrystallites |
Gems & Gemology Summer 1988 |
Fluorite |
yellow |
colour center
with O³- ions |
Steffen, Farbe und Lumineszenz von Mineralien,
2000 |
Fluorite |
yellowish green |
Colour center
containing Y and Ce associated with an F vacancy |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
barite |
Fluorite |
Gems & Gemology 2004
winter p350 |
calcite |
Fluorite |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 3 |
chalcopyrite |
Fluorite |
The Australian
Gemmologist 1987 Februari p184-190 |
chlorite |
Fluorite |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 3 |
cinnabar |
Fluorite |
Gems & Gemology
Summer 2022 p233 |
dickite |
Fluorite |
Gems & Gemology 2011
Winter, p318 |
galena |
Fluorite |
The Australian
Gemmologist 1987 Februari p184-190 |
marcasite |
Fluorite |
E.J. Gübelin and J.I.
Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005) |
pyrite |
Fluorite |
Internal World of
Gemstones, Gübelin, 1983 |
sphalerite |
Fluorite |
The Australian
Gemmologist 1987 Februari p184-190 |
strontianite |
Fluorite |
http://www.gemfrance.com/ |
tourmaline |
Fluorite |
Dietrich, The tourmaline
group, 1985 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
fluorite |
|
|
Kandahar (Qandahar) Province |
Afghanistan |
Gems & Gemology 2002 Spring p95 |
fluorite |
Los Menucos mine |
Valcheta |
Rio Negro |
Argentina |
Gems & Gemology 2007 fall, p 255 |
fluorite |
Valcheta mine |
Valcheta |
Rio Negro |
Argentina |
Gems & Gemology 2007 fall, p 255 |
fluorite |
|
Seilles |
Namur |
Belgium |
|
fluorite |
|
|
Bahia |
Brasil |
Gems & Gemology 2007 fall, p255 |
fluorite |
Huanggang Mine, Hexigten Banner (Keshiketeng) |
Ulanhad League (Chifeng Prefecture) |
Inner Mongolia Autonomous Region |
China |
Ottens, B. (2011): Lapis 36(9), 27-33. |
fluorite |
Penas Blancas District
(Vasquez-Yacopi District), |
San Pablo de Borbur |
Boyaca Department |
Colombia |
Revue de Gemmologie A.F.G. 2000 n°140, juillet p
21-25 |
fluorite |
|
Weardale |
Durham |
England |
Michael O'Donoghue, Gems:
Their Sources, Descriptions and Identification (2006), 873pp |
fluorite |
|
Chamonix |
Haute-Savoie |
France |
Michael O'Donoghue, Gems:
Their Sources, Descriptions and Identification (2006), 873pp |
fluorite |
Stak Nala (Staknala), Skardu Road |
Haramosh Mts |
Baltistan |
Pakistan |
The Journal of Gemmology
2014, Vol 34, No.3, p192-193 |
fluorite |
Huanzala Mine |
Dos de Mayo |
Huanuco |
Peru |
Mineralogical Record 97/4 |
fluorite |
Embilipitiya |
Monaragata |
Southern Province |
Sri Lanka |
Gemmologie Jul 1999, p90 |
fluorite |
Cave-In-Rock Mine,
Cave-In-Rock, Cave-In-Rock District |
Hardin County |
Illinois |
USA |
Michael O'Donoghue, Gems:
Their Sources, Descriptions and Identification (2006), 873pp |
fluorite |
William Wise Mine, Westmoreland |
Cheshire County |
New Hampshire |
USA |
Gems & Gemology 1976 Fall, p200-201 |
CHEMICAL DATA