|
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 |
Andesine |
1.548 |
1.56 |
0.012 |
0.012 |
2.7 |
2.7 |
orangy red |
China |
6.0ct |
|
|
|
|
|
|
cut-off at 445nm, band at 455-475nm |
inert |
inert |
GIA Gem Database 35625 |
Andesine |
1.55 |
1.561 |
0.009 |
0.009 |
2.69 |
2.72 |
brownish red to orange red (Tibet) , yellow (Inner Mongolia) |
Tibet and Inner Mongolia |
alluvial deposit, chelsea for red stones : red |
|
|
|
|
|
|
|
red: dark red; yellow : inert |
red: orange; yellow: inert |
Gems & Gemology 2008 Winter,
p369-373 |
Andesine |
1.55 |
1.561 |
0.009 |
0.01 |
2.67 |
2.72 |
brownish-red, reddsh-orange, orange-red an deep red, bicoloured: red-green and red-colourless |
Bainang, Xigazę area, Tibet |
biaxe positive, chelsea: red, up to 5ct |
1.550 |
1.551 |
1.555 |
1.556 |
1.560 |
1.561 |
broad absorption at 560, very weak band at 630nm |
dark red or inert |
weak chalky orange |
The Journal of Gemmology 2009 Vol31, N°5-8, p283-298 |
Andesine |
1.551 |
1.56 |
0.009 |
0.009 |
2.67 |
2.67 |
red |
Congo (?) |
|
|
|
|
|
|
|
moderately broad band with maximum at 565nm |
weak red |
weak to medium orange |
Gems & Gemology 2002 spring p 94 |
Andesine |
1.552 |
1.561 |
0.009 |
0.009 |
2.69 |
2.69 |
bluish (moonstone) |
India |
1.63ct, 50.7% albite, 46.3% anorthite and 3% orthoclase |
1.552 |
1.552 |
1.557 |
1.557 |
1.561 |
1.561 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1989 Apr, p43-44 |
Andesine |
1.552 |
1.56 |
0.008 |
0.008 |
2.69 |
2.72 |
yellow |
Springsure, Queensland, Australia |
|
|
|
|
|
|
|
|
inert |
inert |
The Australian Gemmologist 2014 Vol25, No 6-7, p231-238 |
Andesine |
1.554 |
1.562 |
0.008 |
0.008 |
2.69 |
2.69 |
red |
Congo (?) |
|
1.554 |
1.554 |
1.557 |
1.557 |
1.562 |
1.562 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2005 Mar, p53-55 |
Andesine |
1.554 |
1.562 |
0.008 |
0.008 |
2.69 |
2.69 |
red |
Congo (?) |
|
1.554 |
1.554 |
1.557 |
1.557 |
1.562 |
1.562 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2005 Mar, p53-55 |
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 |
Andesine |
1.542 |
1.562 |
0.006 |
0.01 |
2.65 |
2.69 |
|
|
|
|
|
|
Gemmo.eu 2015 |
Andesine |
1.543 |
1.551 |
0.008 |
0.008 |
2.65 |
2.69 |
1.543 |
1.543 |
1.548 |
1.548 |
1.551 |
1.551 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Andesine |
1.543 |
1.551 |
0.008 |
0.008 |
2.65 |
2.69 |
1.543 |
1.543 |
|
|
1.551 |
1.551 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Andesine |
1.543 |
1.551 |
0.008 |
0.008 |
2.65 |
2.69 |
|
|
|
|
|
|
http://www.gemmology.be |
Andesine |
1.543 |
1.564 |
0.007 |
0.011 |
2.65 |
2.69 |
1.543 |
1.555 |
1.548 |
1.559 |
1.551 |
1.564 |
http://www.geminterest.com |
Andesine |
1.543 |
1.563 |
0.008 |
0.008 |
2.65 |
2.69 |
1.543 |
1.556 |
1.548 |
1.548 |
1.551 |
1.563 |
Tables of Gemstone Identification, Roger Dedeyn, Ivo
Quintens, 2007 |
Andesine (red) |
1.551 |
1.562 |
0.008 |
0.009 |
2.67 |
2.69 |
1.551 |
1.554 |
|
|
1.560 |
1.562 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
Andesine (red) |
1.551 |
1.562 |
0.008 |
0.009 |
2.67 |
2.69 |
1.551 |
1.554 |
|
|
1.560 |
1.562 |
Tables of Gemstone Identification, Roger Dedeyn, Ivo
Quintens, 2007 |
Andesine |
1.552 |
1.562 |
0.08 |
0.009 |
2.68 |
2.69 |
1.552 |
1.554 |
1.557 |
1.557 |
1.561 |
1.562 |
Gemmological Tables, Ulrich Henn,
2004 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Andesine |
green |
may result from Cu0-Cu+ intervalence charge or from
differences in shape and size of the copper particles |
The Journal of Gemmology, 2009, Vol31, N°5-8, p298 |
Andesine |
red |
clusters of tiny copper particles |
The Journal of Gemmology, 2009, Vol31, N°5-8, p298 |
Andesine |
red |
Feł+ in tetrahedric coordination |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1992, Apr p51 |
Andesine |
yellow |
Feł+ |
The Australian Gemmologist 2014, Vol25, No 6-7, p237 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
copper |
Andesine |
The Journal of Gemmology 2009 , Vol 31, N°5-8,
p283-298 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
andesine |
Bainang |
Xigazę (Rikaze; Shigatse) Prefecture |
Tibet Autonomous Region |
China |
The Journal of Gemmology 2009, Vol 31, N°5-8,
p283-298 |
andesine |
|
|
|
India |
Gemmologie 4 Dec 2001 p185 |
andesine |
|
|
|
Madagascar |
Gemmologie 4 Dec 2001 p185 |
CHEMIE (%)
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
FeO |
CaO |
Na2O |
K2O |
TiO2 |
Fe2O3 |
SrO |
|
Andesine |
bluish (moonstone) |
|
India |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1991, Apr, p44 |
55.05 |
28.17 |
0.08 |
10.19 |
5.24 |
0.5 |
|
|
|
Andesine |
yellow |
Springsure, Queensland |
Australia |
The Australian Gemmologist 2014, Vol 25, No 6-7,
p234 |
53.66 |
28.22 |
|
9.9 |
5.83 |
0.77 |
0.31 |
1.12 |
0.16 |
Andesine |
yellow |
Hogarth Range, New South Wales |
Australia |
The Australian Gemmologist 2014, Vol 25, No 6-7,
p234 |
53.29 |
29.18 |
|
10.11 |
6.14 |
0.58 |
0.11 |
0.42 |
0.14 |
Andesine |
yellow |
Hogarth Range, New South Wales |
Australia |
The Australian Gemmologist 2014, Vol 25, No 6-7,
p234 |
55.08 |
27.8 |
|
10.18 |
5.93 |
0.49 |
0.09 |
0.32 |
0.16 |
Andesine |
yellow |
Hogarth Range, New South Wales |
Australia |
The Australian Gemmologist 2014, Vol 25, No 6-7,
p234 |
55.28 |
27.6 |
|
9.62 |
6.43 |
0.57 |
0.12 |
0.31 |
0.16 |