 | | Journal (article/letter/editorial) | | granitic pegmatites? Clues from hybrid pegmatites in Madagascar Robert F. Martin,1,* Caterina De Vito,2 and Federico...type. Elements of an explanation of the “NYF pegmatite-amazonite” connection emerged in a study of the...granitic pegmatite in Madagascar. The NYF assemblages there and at the Sakavalana and Anjahamiary pegmatites...close to 13‰, indicative of formation of the NYF-pegmatite-forming magma by the melting of crustal rocks... Plumbian K-feldspar also occurs in granitic pegmatite bodies formed by anatexis in the vicinity of a |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | | Journal (issue) | | from Brazil, 8.51 ct Sri Lankan spinel, 13.00 ct Madagascar sphene; (bottom row)— 9.05 ct Sri Lankan “padparadscha”...mastering the market. Looked at The New York diamond district has long been the center of diamond distribution...emerged from sources in Myanmar, Vietnam, and Madagascar. The greater popularity of colored gems has forced...their own right. Recent discoveries in southern Madagascar may provide additional supply. Relatively unknown...fill fractures in very low-quality ruby from Madagascar. The change in the material was astounding: The |  | | Book | | Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...numerous crystal pockets, associated with small albite crystals; the platy, flattened-rhombohedral ilmenite...Swiss hematite iron roses are quartz, ortboclase, albite, rutile, and zeolites (especially stilbite), whereas...resting on cavity linings of sharp, opaque white albite ("pericline") crystals emerged from Imilchil around...their circumferences, occur in matrix of white albite, sometimes with the brown zircon crystals. Evseev |  | | Journal (issue) | | “Liddicoatite tourmaline from Anjanabonoina, Madagascar,” Spring 2002 Gems & Gemology, pp. 28–53). The...claim to the source of this stone, a granitic pegmatite running parallel to the road, and initial mining...Spring 1993 Gems & Gemology, pp. 30–37). The pegmatite was mined until 1995, during the summer seasons...Indeed, the distribution of the beryl in the pegmatite proved to be quite sporadic. In the past three...∞4 m. The location of this large cavity in the pegmatite was unusual, in that it was found only 20– 40 |
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