 | | Report (issue) | | Egypt, Nigeria, Tanzania, . . . . . . . . .52 Mozambique, Zambia, Zimbabwe, South Africa and Madagascar...Asia: Pakistan, Afghanistan and India .......6 0 Old Mine Emeralds . . . . . . . . . . . . . . . . . . . ...Maharajahs and Maharanis held large emeralds (see "Old Mine Emeralds" page 62). The Color of Islam Emerald...varieties are easy to differentiate by color. Apatite is significantly softer. Dioptase, tourmaline and...zone in the Muzo Coscuez-Pefias Blancas mining district. They are disseminated in black shales or albitized |  | | Journal (article/letter/editorial) | | occurrence in Canada, the Muzo mine in Colombia, the Mohmand district in Pakistan, and Norway. Beryl...to 0.02% were of gem-quality. 89 Since then the mine has been re-opened and closed several times (Walton...al., 2002). Australia's most productive emerald district is a 10 km2 area around the village of Poona in...have also been recovered from the Wodgina tantalum mine in Western Australia (Schwarz, 1991). 5.3. Austria...been mined by the Romans or even the Celts. The mine is now dormant. The emerald deposit is situated |  | | Journal (article/letter/editorial) | | Archaean granitoids of Marajoara (Carajás Mineral Province, Brazil) Fernando Althoff a,b, Pierre Barbey b...granitoids of Marajoara in the Rio Maria terrain (Carajás Mineral Province, Brazil) consist of: (i) a broad...(Guarantã); and (iii) 2.87 Ga post-tectonic monzogranites (Mata Surrão) and granodiorites (Rio Maria), displaying...regional NS horizontal shortening. Although the Rio Maria terrain presents similarities with Archaean domains...shaped the granite – greenstone terrains. The Rio Maria area, probably as many Archaean ‘grey gneisses’ |
|
