|
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 |
Moonstone - Feldspar |
1.518 |
1.53 |
0.006 |
0.01 |
2.56 |
2.6 |
|
Zillertal, Austria |
"adular" |
1.518 |
1.520 |
1.522 |
1.526 |
1.524 |
1.530 |
|
strong red-pink |
inert |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.518 |
1.528 |
0.006 |
0.008 |
2.56 |
2.6 |
|
Sri Lanka |
|
1.518 |
1.520 |
1.522 |
1.524 |
1.524 |
1.528 |
|
strong red |
red-violet |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.518 |
1.528 |
0.006 |
0.008 |
2.56 |
2.6 |
|
India |
|
1.518 |
1.520 |
1.522 |
1.524 |
1.524 |
1.528 |
|
strong red |
red-violet |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.518 |
1.53 |
0.006 |
0.01 |
2.56 |
2.6 |
|
Zillertal, Austria |
"adular" |
1.518 |
1.520 |
1.522 |
1.526 |
1.524 |
1.530 |
|
strong red-pink |
inert |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.518 |
1.528 |
0.006 |
0.008 |
2.56 |
2.6 |
|
Sri Lanka |
|
1.518 |
1.520 |
1.522 |
1.524 |
1.524 |
1.528 |
|
strong red |
red-violet |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.518 |
1.528 |
0.006 |
0.008 |
2.56 |
2.6 |
|
India |
|
1.518 |
1.520 |
1.522 |
1.524 |
1.524 |
1.528 |
|
strong red |
red-violet |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.52 |
1.53 |
0.008 |
0.01 |
2.57 |
2.57 |
colourless, white adularescence with a slight blue component |
Zillertal, Tirol, Austria |
18.69ct and 27.56ct |
|
|
|
|
|
|
|
weak orange |
weak blue |
The Journal of Gemmology 2014 Vol 34,N°3, p190 |
Moonstone - Feldspar |
1.52 |
1.525 |
0.005 |
0.005 |
2.53 |
2.53 |
|
Switserland |
"adular" |
1.520 |
1.520 |
1.522 |
1.522 |
1.525 |
1.525 |
|
grey-bluish |
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.52 |
1.525 |
0.005 |
0.005 |
2.53 |
2.53 |
|
Switserland |
"adular" |
1.520 |
1.520 |
1.522 |
1.522 |
1.525 |
1.525 |
|
grey-bluish |
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.525 |
1.531 |
0.005 |
0.005 |
2.57 |
2.58 |
very light yellow-grey, moderate bluish adularescence, transparent to
semitransparent |
20 km ENE of Ihosy, Madagascar |
|
|
|
|
|
|
|
nihil |
weak to moderate orange red |
very weak violet-blue |
Gems & Gemology 2006 winter, p 276 |
Moonstone - Feldspar |
1.53 |
1.54 |
0.01 |
0.01 |
2.64 |
2.64 |
very light grey to very light yellow with strong blue adularescence |
Kilosa, 80 km west of Morogoro, Tanzania |
albitic moonstone, transparent to semi-transparent |
|
|
|
|
|
|
|
weak red |
inert |
Gems & Gemology 2005 Spring p 60 |
Moonstone - Feldspar |
1.531 |
1.542 |
0.009 |
0.009 |
2.62 |
2.63 |
|
Tanzania |
=albite |
1.531 |
1.533 |
1.534 |
1.536 |
1.540 |
1.542 |
|
red-pink |
white-blue |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.531 |
1.542 |
0.009 |
0.009 |
2.62 |
2.63 |
|
Tanzania |
=albite |
1.531 |
1.533 |
1.534 |
1.536 |
1.540 |
1.542 |
|
red-pink |
white-blue |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.55 |
1.567 |
0.01 |
0.01 |
2.7 |
2.69 |
|
India |
rainbow moonstone |
1.550 |
1.557 |
1.555 |
1.563 |
1.560 |
1.567 |
|
violet-pink |
strong white-pink |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.55 |
1.567 |
0.01 |
0.01 |
2.7 |
2.69 |
|
India |
rainbow moonstone |
1.550 |
1.557 |
1.555 |
1.563 |
1.560 |
1.567 |
|
violet-pink |
strong white-pink |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2019 68/3-4, p44 |
Moonstone - Feldspar |
1.553 |
1.566 |
0.013 |
0.013 |
2.69 |
2.69 |
colourless with iridescent colours |
Malawi |
rainbow moonstone (labradorite), 12.22ct |
|
|
|
|
|
|
|
greenish yellow |
chalky purplish pink |
The Journal of Gemmology 2014 Vol 34, No 3, p200 |
Moonstone - Feldspar |
1.554 |
1.56 |
0.006 |
0.006 |
2.66 |
2.7 |
near colourless with strong blue, orange, yellow, green, violet and pink
adularescence |
Zambia |
rainbow moonstone, 2.08 to 4.24ct, and 8.33ct, border between andesine
and labradorite |
|
|
|
|
|
|
|
weak red |
inert to weak blue |
Gems & Gemology 2012 Summer,
p146-147 |
Moonstone - Feldspar |
1.56 |
1.56 |
|
|
2.69 |
2.69 |
blue labradorescence |
Patna, Bihar, India |
|
|
|
|
|
|
|
|
weakly chalky, weak pinkish |
moderately chalky |
Gems & Gemology 1997 summer,
p144-145 |
Moonstone - Feldspar |
1.56 |
1.56 |
|
|
2.69 |
2.69 |
near colourless, displaying orange, yellow, green, blue and violet
adularescence |
Madagascar |
4.41ct cabochon, spot RI, rainbow moonstone |
|
|
|
|
|
|
none |
weak red |
weak white |
Gems & Gemology 2012 Fall, p223-224 |
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 |
Moonstone - Feldspar |
1.508 |
1.536 |
0.005 |
0.008 |
2.55 |
2.61 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Moonstone - Feldspar |
1.517 |
1.56 |
0.004 |
0.011 |
2.55 |
2.67 |
|
|
|
|
|
|
Gemmo.eu 2015 |
Moonstone - Feldspar |
1.518 |
1.525 |
0.005 |
0.006 |
2.56 |
2.59 |
|
|
|
|
|
|
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Moonstone - Feldspar |
1.518 |
1.536 |
0.005 |
0.009 |
2.54 |
2.6 |
1.518 |
1.519 |
|
|
1.526 |
1.536 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Moonstone - Feldspar |
1.518 |
1.527 |
0.006 |
0.007 |
2.56 |
2.6 |
1.518 |
1.520 |
1.522 |
1.524 |
1.524 |
1.527 |
Gemmological Tables, Ulrich Henn,
2004 |
Moonstone - Feldspar |
1.518 |
1.54 |
0.004 |
0.012 |
2.53 |
2.72 |
1.518 |
1.526 |
1.522 |
1.533 |
1.522 |
1.540 |
http://www.geminterest.com |
Moonstone - Feldspar |
|
|
|
|
2.56 |
2.58 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Moonstone - Feldspar |
blue |
raleigh scattering of light by lamellar structure |
Gems & Gemology Summer 1988 |
Moonstone - Feldspar |
green |
Fe³+ |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez 2014, p87 |
Moonstone - Feldspar |
rainbow colours |
results from a combination of adularescence and
labradorescence |
Gems & Gemology Fall 2012, p224 |
Moonstone - Feldspar |
red |
Fe³+ |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez 2014, p87 |
Moonstone - Feldspar |
smoky brown |
Fe²+ (smoky moonstone from Imblupe, Sri Lanka) |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez 2014, p83 |
Moonstone - Feldspar |
yellow |
caused by iron oxide impurities concentrated in
fissures |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft Juni 2014, p47 |
MINERAL
INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
moonstone |
|
Coimbatore district |
Madras |
India |
Webster, Gems 5th edition (1994), p209 |
moonstone |
|
Imblupe(Imbulpe) |
|
Sri Lanka |
Gemmologie 4 Dec 2001 p183 |
moonstone |
|
Dumbara district |
Central Province |
Sri Lanka |
Webster, Gems 5th edition (1994), p209 |
moonstone |
|
Kandy district |
Central Province |
Sri Lanka |
Webster, Gems 5th edition (1994), p209 |
moonstone |
|
Ambalangoda |
Southern Province |
Sri Lanka |
Webster, Gems 5th edition (1994), p209 |
moonstone |
|
Meetiyagoda (Metiyagoda) |
Southern Province |
Sri Lanka |
Gemmologie 4 Dec 2001 p182 |
moonstone |
Kilosa, 80 km west of Morogoro |
|
|
Tanzania |
Gems & Gemology Spring 2005, p60 |
CHEMICAL DATA
(%)
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
Na2O |
Cr2O3 |
Ga2O3 |
Fe2O3 |
K2O |
SrO |
Rb2O |
PbO |
BaO |
|
Moonstone |
|
Zillertal |
Austria |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
62.1 |
17.39 |
|
|
0.02 |
|
0.02 |
1.14 |
|
|
|
18.84 |
|
|
|
|
Moonstone |
|
|
India |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2014, p85 |
61.25 |
18.71 |
|
|
0.02 |
|
0.39 |
2.92 |
|
|
|
11.51 |
|
|
|
1.08 |
Moonstone |
|
|
India |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
61.25 |
18.7 |
|
|
0.02 |
|
0.39 |
2.92 |
|
|
|
11.51 |
|
|
|
|
Moonstone |
rainbow moonstone |
|
India |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
53.76 |
27.08 |
|
|
0.1 |
|
10.03 |
5.55 |
|
|
|
0.3 |
|
|
|
|
Moonstone |
|
|
Sri Lanka |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2014, p85 |
62.41 |
18.28 |
|
|
0.09 |
|
0.24 |
4.66 |
|
|
|
9.6 |
|
|
|
0.03 |
Moonstone |
|
|
Sri Lanka |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
62.41 |
18.28 |
|
|
0.09 |
|
0.24 |
4.66 |
|
|
|
9.6 |
|
|
|
|
Moonstone |
|
Balangoda |
Sri Lanka |
The Journal of Gemmology 1992, Vol 23, N°1 p30 |
65.1 |
18.6 |
0.03 |
|
0.03 |
0.02 |
0.2 |
1.8 |
0.02 |
0.002 |
|
13.8 |
0.08 |
0.04 |
|
0.004 |
Moonstone |
dark smoky |
Imbulpe |
Sri Lanka |
The Journal of Gemmology 1994, Vol 24, N°3, p180 |
66.5 |
19 |
|
|
0.094 |
0.02 |
0.74 |
5.9 |
|
|
0.014 |
7.7 |
0.05 |
0.013 |
|
0.04 |
Moonstone |
light smoky |
Imbulpe |
Sri Lanka |
The Journal of Gemmology 1994, Vol 24, N°3, p180 |
66.4 |
19.1 |
|
0.005 |
0.06 |
0.02 |
0.64 |
5.34 |
|
|
0.003 |
8.41 |
0.05 |
0.009 |
|
0.03 |
Moonstone |
colourless |
Metiyagoda |
Sri Lanka |
The Journal of Gemmology 1994, Vol 24, N°3, p180 |
66.2 |
18.8 |
|
|
0.014 |
0.004 |
0.3 |
3.7 |
|
|
0.007 |
10.1 |
0.02 |
0.07 |
0.02 |
0.004 |
Moonstone |
|
|
Switserland |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
64.03 |
17.54 |
|
|
0.06 |
|
|
0.018 |
|
|
|
17.93 |
|
|
|
|
Moonstone |
yellow |
|
Tanzania |
Gemmologie Juni 2014, p49 |
65.17 |
21.07 |
|
|
0.06 |
|
2.19 |
10.14 |
|
|
|
0.49 |
|
|
|
0.02 |
Moonstone |
|
|
Tanzania |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2014, p85 |
64.81 |
20.75 |
|
|
0.06 |
|
1.6 |
9.42 |
|
|
|
0.47 |
|
|
|
0.16 |
Moonstone |
|
|
Tanzania |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft, Dez, 2019, p44 |
64.81 |
20.75 |
|
|
0.06 |
|
1.6 |
9.42 |
|
|
|
0.47 |
|
|
|
|