|
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 |
Pargasite |
1.62 |
1.64 |
0.02 |
0.02 |
3.17 |
3.17 |
Yellowish
brown |
Myanmar |
1.78ct |
|
|
|
|
|
|
|
weak
yellow |
inert |
Gems & Gemology 2004 Fall,
p256 |
Pargasite |
1.625 |
1.64 |
0.015 |
0.015 |
3.03 |
3.03 |
Yellowish
green |
Pakistan |
0.59ct |
|
|
|
|
|
|
|
Very weak yellowish
green |
inert |
Gems & Gemology 2004 Fall,
p256 |
Pargasite |
1.628 |
1.648 |
0.02 |
0.02 |
3.07 |
3.09 |
orangy brown to yellowish
brown |
Dodoma region,
Tanzania |
1.23 to
8.36ct |
1.628 |
1.628 |
1.633 |
1.633 |
1.648 |
1.648 |
|
moderate to strong chalky
yellow |
inert |
Gems & Gemology 2011 Spring,
p65 |
Pargasite |
1.63 |
1.645 |
0.015 |
0.015 |
3.06 |
3.07 |
green |
Astor Valley,
Pakistan |
2.07 ct,
transparent |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2009 58/3-4/Dec,
p84-85 |
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 |
Pargasite |
1.612 |
1.671 |
0.018 |
0.024 |
3.03 |
3.19 |
|
|
|
|
|
|
Gemmo.eu 2013
|
Pargasite |
1.613 |
1.635 |
0.022 |
0.022 |
3.07 |
3.18 |
|
|
|
|
|
|
http://www.gemmology.be
|
Pargasite |
1.613 |
1.635 |
0.022 |
0.022 |
3.069 |
3.181 |
1.613 |
1.613 |
1.618 |
1.618 |
1.635 |
1.635 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
Pargasite |
1.613 |
1.65 |
0.019 |
0.024 |
3.06 |
3.2 |
1.613 |
1.629 |
1.618 |
1.635 |
1.635 |
1.650 |
http://www.geminterest.com
|
Pargasite |
1.613 |
1.65 |
0.02 |
0.022 |
3.07 |
3.18 |
1.613 |
1.630 |
1.618 |
1.618 |
1.635 |
1.650 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
Pargasite |
1.613 |
1.635 |
0.022 |
0.022 |
3.069 |
3.181 |
|
|
|
|
|
|
Gemology Tools Professional 2010
|
Pargasite |
1.628 |
1.651 |
0.023 |
0.023 |
|
|
|
|
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
CAUSE OF COLOUR
Stone |
Colour |
Cause of
colour |
Reference |
Pargasite |
green to
brown |
Feł+ in various
sites |
Gems & Gemology Summer
1988 |
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA (%)