 | | Journal (issue) | | 22, 5 'Machingwe': A new emerald deposit in Zimbabwe Jan Kanis*, Charles E.S. Arps** and Pieter C....in the Mweza Range Greenstone Belt of southern Zimbabwe are discussed and compared with data from Sandawana...visit to a newly discovered emerald occurrence in Zimbabwe, named 'Machingwe deposit', thanks to the kind...assistance of the Mineral Marketing Corporation of Zimbabwe. This Corporation is a state controlled department...reactions altering the ultramafic rocks into biotite and biotite-phlogopite schists. A similar lithology has |  | | Journal (issue) | | Update on Emeralds from the Sandawana Mines, Zimbabwe J.C. (Hanco) Zwaan, Jan Kanis, and Eckhard J.... UPDATE ON EMERALDS FROM THE SANDAWANA MINES, ZIMBABWE By J. C. (Hanco) Zwaan, Jan Kanis, and Eckehard...is believed by some that the area now known as Zimbabwe was the fabled land of Ophir, which produced gold...contributed to emerald formation in this part of Zimbabwe, but it also offers new data on the distinctive...geographers had referred—in the interior of what is now Zimbabwe, near Hartley (now Chegutu). Subsequently, after |  | | Journal (issue) | | 260-264. A NOTE ON THE OCCURRENCE OF EMERALD AT MAYFIELD FARM, FORT VICTORIA, RHODESIA* By SUSAN ANDERSON...corner of Mayfield Farm, approximately 12 km north-east of the town of Fort Victoria. The Mayfield Beryl...discussed in this report. GEOLOGY The beryl at Mayfield was apparently formed in a hydrothermally emplaced...chromium and vary mineralogically from predominantly biotite-phlogopite schists to rocks that additionally contain...optical constants, may serve to distinguish the Mayfield emerald from material originating elsewhere. |  | | Journal (issue) | | Twin Star Serpentine, Novello (Martin, 1962) Biotite rock, Chikwanda ( Martin, 1962 ) SPECTROSCOPIC...the host-rock material, i.e. brown phlogopite-biotite mica. T h e flakes averaged in size about 0-2 m...of ironstone occurring in the Cunnamulla Mining District, some of which contain precious opal. They are...Tanzania. It has now been found in Kenya in the Taita district and the mine at which it is found is known as...pockets in the pegmatite which runs through the district, and tourmaline is also found. An especially fine |  | | Journal (issue) | | Cover Picture Faceted sapphire from Cyangugu district, SW Rwanda. See Investigations on sapphires from...Sapphires have been discovered in the Cyangugu district in south-west Rwanda (bordering Zaire) and details...Abstract A new deposit of sapphires in the Cyangugu district of SW Rwanda has been investigated. The sapphires...sapphire deposit in a basalt province in the Cyangugu district, SW Rwanda (Figure 1). This investigation was...representative sapphire samples from the Cyangugu district were selected for the laboratory and investigated |  | | Journal (issue) | | emeralds, with known schist-type deposits in Zambia, Zimbabwe, Mozambique, Tanzania, ~ ~and ~ South Africa,...Anlzadilalana, Hanni and Klein (1982) identified brown biotite, muscovite, apatite, hematite, goethite, quartz...methods by which he identified them). These include biotite platelets; euhedral transparent crystals of a colorless...Russian Federation" Zambiah (Koivula, 1992, 1984) Zimbabwe (Anderson, 1976) Austria (Schwarz, 1991b) Brazil...et al., 1990) Pakistan (Gubelin, 1989) Zambia" Zimbabwe*' Austria (Grundmann, 1991) Brazil (Hanni el al |  | | Book | | (formerly Belgian Congo), Zambia, 602 485 Zimbabwe Norway, 486 (formerly Rhodesia), 603 488 ...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock...location of the mines Holland’s translation, of district, and it could have been Probably these mines...prism face and several pyramidal Diamantina district, Brazil; (1.75 x 1.4 in). beryl transparent... Gallagher and Hawkes the Miami massive also district iron-impregnated were akite, and products |  | | Book | | (Egypt) 208 United States of America 209 Zambia 209 Zimbabwe 209 Appendix: Beryl names and terms 211 Index...Pakistan, South Africa, Tanzania, USSR, Zambia, Zimbabwe Goshenite; Malagasy Republic, Brazil, USA (rare)...Red Sea which passed through the emerald mine district, and it could have been a trading centre for these...Probably these mines, in the Wadi and Gebel Sikait district, correspond to those labelled 'Ethiopian' by Pliny...basal race and several pyramidal forms. Diamantina district, Brazil; 45 x 36 mm ( I. 75 x 1.4 in). William |  | | Book | | (Egypt) United States of America 209 Zambia 209 Zimbabwe 209 Appendix: Beryl names and terms Index 223...Pakistan, South Africa, Tanzania, USSR, Zambia, Zimbabwe Goshenite; Malagasy Republic, Brazil, USA (rare)...Red Sea which passed through the emerald mine district, and it could have been a trading centre for these...Probably these mines, in the Wadi and Gebel Sikait district, correspond to those labelled ‘Ethiopian’ by Pliny...basal face and several pyramidal forms. Diamantina district, Brazil; 45 x 36mm (1.75 x 1.4in). William Larson |
|
