|
INVESTIGATIONS
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 |
Boracite |
2.96 |
2.96 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972
| ||||
Boracite |
1.658 |
1.672 |
0.01 |
0.011 |
2.95 |
2.96 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
Boracite |
1.658 |
1.673 |
0.011 |
0.011 |
2.95 |
2.95 |
1.658 |
1.662 |
1.662 |
1.667 |
1.668 |
1.673 |
http://www.geminterest.com
|
Boracite |
1.658 |
1.693 |
0.01 |
0.011 |
2.95 |
2.96 |
1.658 |
1.662 |
|
|
1.688 |
1.693 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
Boracite |
1.658 |
1.673 |
0.01 |
0.011 |
2.9 |
3 |
1.658 |
1.662 |
1.662 |
1.667 |
1.668 |
1.673 |
Gemmological Tables, Ulrich Henn, 2004
|
Boracite |
1.658 |
1.673 |
0.011 |
0.011 |
2.95 |
2.95 |
|
|
|
|
|
|
http://www.gemmology.be
|
Boracite |
1.658 |
1.673 |
0.011 |
0.011 |
2.95 |
2.95 |
1.658 |
1.662 |
1.662 |
1.667 |
1.668 |
1.673 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
Boracite |
1.658 |
1.673 |
0.01 |
0.011 |
2.86 |
3.1 |
1.658 |
1.662 |
1.662 |
1.667 |
1.668 |
1.673 |
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
Boracite |
1.661 |
1.671 |
0 |
0 |
2.96 |
2.96 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
Boracite |
1.661 |
1.671 |
0 |
0 |
2.96 |
2.96 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE | |||
Boracite |
|
Hannover |
Niedersachsen |
Germany |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Boracite |
|
Stassfurt |
Sachsen-Anhalt |
Germany |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
CHEMICAL DATA