 | | Journal (issue) | | from the Russian Far East Grandidierite from Madagascar Editorial Staff Editor-in-Chief Editors, Lab...Jewish Autonomous District. 266 A New Deposit of Gem-Quality Grandidierite in Madagascar Delphine Bruyère...inclusion in quartz • Inclusions in spinel from Madagascar • Sphalerite in topaz • Tourmaline termination...articles including sapphires from Russia, a new Madagascar deposit of the rare gem grandidierite, Vietnamese...occurrence of the rare gem grandidierite in southern Madagascar and provides a gemological characterization of |  | | Journal (issue) | | display. Fig. 3 Bournonite twins on pyrite, Quiruvilca District, Santiago de Chuco Province, La Libertad...qualities of the gocth ite ps. o f marcasite and pyrite ( espcc1_a ll~ 011 the left side of the case whic\A...within the c rysta ls. The ra res t and m o t d esira bl e c rysta ls to be fo und on Pe tersen Mounta...fine minera l specimens, suc h as the brilliant pyrite c lus te rs co ll ected durin g the con !ruc tio...1999) a nd San Antonio, Texas. Large cuboc1ahcclral pyrite c rysta ls a rc found a t cement compa ny q ua |  | | Book (volume) | | in an oceanic environment. The Precambrian of Madagascar , covering t,.\-o-thirds of the island, h as...unpublished data. I °\Vas fortunate enough to visit Madagascar in 1965, gainii1g some firsthand kno"''ledge...similarity between the metamorphosed Precambrian of Madagascar and of Finlan d is indeed astonishing. It is...intercalated traps. He chose the name " Dharwar" from the district (no,v- in 1\1:ysore State) in which he first recognized...some of the quartzites occurring in the Tumkur district. B. JAYARAl\i succeeded W. F. SMEE1'H as Director |  | | Journal (issue) | | 2016 • Blue sapphire rush in Madagascar • Red cordierite from Madagascar • Corundum from Muling, China...for example, in Sri Lanka, India, Tanzania, and Madagascar (Menon et al., 1994; Gunaratne and Dissanayake...for slightly greenish yellow chrysoberyls from Madagascar and Sri Lanka (Witthayarat and Thanasuthipitak...as Thailand, Laos, Cambodia, China, Nigeria, Madagascar, and Scot- GEMS & GEMOLOGY SPRING 2016 ABSORPTION...New gemstone occurrences in the south-west of Madagascar. Journal of Gemmology, Vol. 27, No. 7, pp. 385–394 |  | | Book | | fied (Isergebirge District, Poland; Ipameri, Goias Brazil; Esira region, Madagascar) Pod-like replacements...much tourmaline and cassiterite, it also contains pyrite, arsenopyrite, chalcopyrite, and galena (Roe, 1951)...noted above, locally garnet, pyroxene, amphibole, pyrite, pyrrhotite and secondary iron oxides are present...cassiterite, tourmaline, ilvaite, epidote, pyrrhotite, pyrite, chalcopyrite, arsenopyrite and galena”. Both locally...and other opencast and underground mines of the district. Material I collected from one of the sites consisted |  | | Report (issue) | | taking place on surfaces of iron sulfide crystals (pyrite), where iron served as a reducing agent (Dörr et...Detailed mapping of the fresh central floor pit crater Esira (16.3 km in diameter, centered at 8.9°N, 313.4°E)...morphological and structural mapping and analysis of Esira, a central pit crater near Hypanis Vallis: Houston...1981, Quartz with rhombohedral cleavage from Madagascar: The American Mineralogist, v. 66, p. 596–600 |  | | Book | | was also marked by the separatio n of India and Madagascar and the sundering of the Seyche lles p latform...hot spot and perhaps rifting between India and Madagascar. Porphyritic lavas are the norm in the Deccan...activity, although rifting between India and Madagascar may have accompanied the event. The considerably...enite. n1onazite, titanite. allan ite. rourn1aline. pyrite. and fluorite. plus a host of others, dependi....Carbonates Nan1e Coarse Pyrrhotite D olo1n ite Pyrite A nkerite Galena Side rite Sphalerile Stronlan |
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