|
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 |
|
Malachite |
1.653 |
1.907 |
0.254 |
0.254 |
4 |
4 |
light green to dark green |
Congo (Zaire) |
|
1.653 |
1.653 |
1.874 |
1.874 |
1.907 |
1.907 |
|
|
|
Gems & Gemology 1987 Fall, p152-157 |
|
synthetic malachite |
1.654 |
1.907 |
0.253 |
0.253 |
3.95 |
3.95 |
almost black to light green with pale bluish tint |
|
produced by Leningrad State University |
1.654 |
1.654 |
1.875 |
1.875 |
1.907 |
1.907 |
|
|
|
Gems & Gemology 1987 Fall, p152-157 |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
4.1 |
4.1 |
green |
Kazakhstan |
|
1.655 |
1.655 |
1.875 |
1.875 |
1.909 |
1.909 |
|
|
|
Gems & Gemology 1987 Fall, p152-157 |
|
synthetic malachite |
1.657 |
1.908 |
0.251 |
0.251 |
4 |
4 |
light green to dark green |
|
Made by the All-Union Institute for the Synthesis of Mineral Raw
Materials (Russia) |
1.657 |
1.657 |
1.876 |
1.876 |
1.908 |
1.908 |
|
|
|
Gems & Gemology 1987 Fall, p152-157 |
|
synthetic malachite |
1.658 |
1.911 |
0.253 |
0.253 |
3.9 |
3.9 |
almost black to light green |
|
made by the Ministry of Geology of the USSR |
1.658 |
1.658 |
1.877 |
1.877 |
1.911 |
1.911 |
|
|
|
Gems & Gemology 1987 Fall, p152-157 |
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 |
|
Malachite |
1.65 |
1.909 |
0.25 |
0.25 |
3.25 |
4.1 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Malachite |
1.655 |
1.909 |
0.23 |
0.254 |
3.75 |
4.05 |
1.655 |
1.655 |
1.875 |
1.875 |
1.909 |
1.909 |
http://www.geminterest.com |
|
Malachite |
1.655 |
1.91 |
0.25 |
0.254 |
3.6 |
4.1 |
1.655 |
1.660 |
|
|
1.909 |
1.910 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
3.75 |
3.95 |
1.655 |
1.655 |
1.875 |
1.875 |
1.909 |
1.909 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
3.6 |
4.05 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
3.6 |
4.05 |
1.655 |
1.655 |
1.875 |
1.875 |
1.909 |
1.909 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
3.6 |
4.05 |
|
|
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Malachite |
1.66 |
1.91 |
0.25 |
0.25 |
3.25 |
4.1 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Malachite |
1.77 |
1.8 |
|
|
3.74 |
3.8 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
|
Malachite |
1.655 |
1.909 |
0.254 |
0.254 |
3.25 |
4.1 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
|
Malachite |
1.83 |
1.87 |
0.25 |
0.255 |
3.8 |
4.05 |
|
|
|
|
|
|
Gemmo.eu 2013 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Malachite |
green |
Cu³+ in octahedral coordination |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Malachite |
Serra Verde Mine |
Carajas mineral province |
Para |
Brazil |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991, Sep, p99-102 |
|
Malachite |
Rosita Mine |
Siuna |
Region Autonoma del Atlantico Norte |
Nicaragua |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1989, Apr, p19 |
CHEMICAL DATA
(%)