Glaucophane, []Na2(Mg3Al2)Si8O22(OH)2, 6x8 cm Sonoma Co., California, USA Amphibole bought from Ward's, 1980. Photo and Coll. P. Perroud (now in NHM Geneva). |
A T H E N A |
Glaucophane, []Na2(Mg3Al2)Si8O22(OH)2, 6x8 cm Sonoma Co., California, USA Amphibole bought from Ward's, 1980. Photo and Coll. P. Perroud (now in NHM Geneva). |