 | | Journal (issue) | | Vesuvianite Alpe Frasse, Torino Vesuvianite Bellecombe, Aosta b) le zone interessate a metamorfismo, ove si rinviene...d'Ala, Val di Viù e Val di Susa (Piemonte), al Montjovet e Bellecombe (Val d'Aosta), ecc. Il colore della...di Viù, Bellecombe, Adamello) al verde chiaro (Montjovet, Bellecombe, Testa Ciarva) al giallo verdastro...Tanzanite A causa del fenomeno geologico della Rift Valley, l'Africa orientale è ricca di minerali preziosi...hanno nulla a che vedere tra loro, nella Fig 4A: calcite, Okeeechobee Country, realtà non si escludono a |  | | Report (issue) | | (2) 37.64 43.10 19.26 Total 99.91 (1) Emarese, Italy. (2) Mg5 (CO3 )4 (OH)2 • 4H2 O. 100.00 CO2 MgO...component of “moonmilk” and speleothems. Association: Calcite, dolomite, aragonite, brucite, magnesite, artinite...From Kraubath, Salzburg, Austria. In Italy, from Emarese and Montjovet, Val d’Aosta, Piedmont; at Predazzo...East Antarctica. The most common carbonate after calcite and aragonite in caves worldwide. Name: In allusion |  | | Report (issue) | | after deduction of Si02 as chrysotile an~+Ca as calcite, corresponds to ~glO.o~Fe~t8CO.92H27.85029' (2)...hydromagnesite, brucite, magnetite, chromite, uvarovite, calcite (near Coalinga, California, USA). Association:...Unst, Shetland Islands, Scotland. From Montjovet, Piedmont, Italy. In Russia, in the Lower Tagil massif |  | | Journal (issue) | | Williams Minerals of the Alpine Rodingites of Italy ............................ 85 By C. M. Gramaccioli...fine grains and in very long fibers to 15 cm Calcite Chalcocite Chlorite group Chromite C aC 03 Cu2S...stellate needles of a few mm on pectolite with calcite Brown to green, bright, shiny, prismatic crystals...Gemstones We offer choice mineral specimens from PALA VALLEY, CALIFORNIA • MINAS GERAIS, BRAZIL • CLASSIC EUROPEAN...Collector Correspondence Invited Jim Dupont 391 Valley Road W atchung, NJ 07060 P.O. BOX 1311 QUARTZITE |  | | Book (volume) | | modificazioni cristalline (e quindi mi nerali: vedi calcite e aragonite, ecc.; vedi anche pag. 72). diorite...parziale delle fessure si puo trovare anche la calcite, non d i rado ben cristallizzata. In quantita subordinata...lVli11era/i sempre presenti, come ii la clorite e la calcite; ria, 1 'albite, 2) 1Vli11erali « guida •• e...interessanti, quali soprattutto la dolomite, la calcite, il quarzo e - come minerali accessori - il rutilo...caratteristica e curiosa varieta spa tica di calcite azzurra. Si ha soprattutte vesu vianite , granato |  | | Journal (issue) | | 1994,24,3 Pleochroism was documented using a calcite dichroscope. Specific gravity determinations were...here it forms the eastern margin of the great rift valley. The gemstones from this region of East (0 Copyright...rhodolite; Longido for ruby in zoisite; the Umba River valley for fancy sapphire, garnet and other gems; Mpwapwa...Bellecombe and Montjovet (AD Italy): a material of gemmological interest Massimo N()'uagll Milan, Italy Chatillon...OELLE CAPAE Bellecombe • lOC . BANCHETTE Montjovet VALLE D'AOSTA M.CERVINO Verres fig. ] _ Map |  | | Journal (issue) | | continuously secreted to wrap the inorganic crystals of calcite and aragonite as a sponge embraces its voids. There...calcium carbonate (CaC0 3 ), usually in the form of calcite. The prisms of this layer are perpendicular to...name for this layer is the prismatic layer or 'calcite primer'. The third and innermost layer forms the...crystals is orientated paraliei to the c-axis of the calcite prisms, or in other words at right angles to the...changes with the latter's age from conchin via calcite to aragonite. This has been vaguely known for a | | | Journal (issue) | | Williams Minerals of the Alpine Rodingites of Italy ................ 85 By C. M. Gramaccioli An interesting...fine grains and in very long fibers 10 1 5 cm Calcite Chalcocite Chlorite group Chromite CaCO 3 Cu2...stellate needles of a few mm on pectolite with calcite Brown to green. bright. shiny. prismatic crystals... • We otter choice mineral specimens from PALA VALLEY, CALIFOR NIA • M INAS GERAIS, BRAZIL • CLASSIC...Collector Correspondence Invited Jim Dupont 391 Valley Road Watchun , NJ 07060 � It) U) "1CROMOUNJ' |  | | Book | | Filrnset by Kcyspools Ltd, Golbornc, Lanes Printed in Italy 3 6 8 8 9 10 l1 11 23 30 33 36 45 205 209 2I...bite, adularia and often even some marvellous calcite crystals. Less frequent, but still presenting good...ofstalactites and stalagmites, or of travertine or fine calcite crystals. T he same happens to dolomites, although...(rhombic) ; diamond (cubjc) and graphite (hexagonal) ; calcite (trigonal) and aragonite (rhombic). ISOMORPHISM...carbonates afford an example of an isomorphic series: calcite (CaCO 3 ), rhodocrosite (MnCO 3 ) , sideritc (FeCO |  | | Journal (issue) | | increased iron content. Strongly corroded apatite and calcite have been found as inclusions in hessonite, as...(1986) this is due to a colloid separation of calcite in the hessonite from Sri Lanka. Also lamellar...lenses always contain K-feldspar, wollastonite, calcite and quartz. Other characteristic minerals are grossular...hessonite crystals in 'pockets', together with calcite and small diopside crystals (Figures 2 and 3)....described from the classic location of Val Malenco, Italy. From the photographs the colour is the expected |  | | Book (volume) | | modificazioni cristalline (e quindi mi nerali: vedi calcite e aragonite, ecc.; vedi anche pag. 72). diorite...chiari, aghiformi, con cristallini esagonali di calcite. Monte Rosso di Verra, presso Saint Jacques, Champoluc...campione, per lo piu in aghi sottili, anche in Val d ' Aosta (Montjo vet e Bellecombe presso Saint Vincent,...rararnente nella miniera di Saint Marcel in Val d' Aosta, come localita unica al mon do. Il violano e stato...pirosseni : 1 - Fassaite, tipici cristalli opachi, con calcite biancastra. Toal de la Foia, Monzoni (ca. 2x) |  | | Book (edition) | | opaque mineral to reflect the light gypsum. 3 - calcite, 4 - fluorite, 5 - apatite, 6 - ortho- beam on...byssolite. Mono- coast of North America: Kobuk River Valley, Alaska, clinic, C2/m, a,b,c = 9.89, 18.20, 5.31... Actinolite - byssolite, 50 mm, Valle d'Aosta, Italy, G short-columnar crystals, usually in granular...overlooking Zillertal Valley, Tirol, Austria, and at Passo di Vizze, Trentino-Alto Adige, Italy. Actinolite asbestos...Mont Blanc, as well as in Val Malenco, Lombardy, Italy. A component of some skarns and eclogites. With |  | | Book | | [the Santa Lucia and Sa Duchessa mines,] Sardinia [Italy] (by F. Olmi, C. Sabelli & G. Brizzi) 19:305-310...ALBERTINI, CLAUDIO Famous mineral localities: Baveno, Italy 14:157168 ALBITE Davis Hill near Bancroft, Ontario:...nepheline, biotite and albite-antiperthite crystals in calcite-cored vein-dikes (by L. Moyd) 21:235-248 ALICE...8:287-293 Minerals of the Alpine rodingites of Italy (by C. M. Gramaccioli) 10:85-89 Micromounting in...Arcu su Linnarbu, Capoterra, Cagliari, Sardinia [Italy] (by R. Vochten & G. Brizzi) 18:181-184 AREM, JOEL |  | | Journal (issue) | | Notes and New Techniques Figure 4. Light-colored calcite marble in Kootchinskoye quarry's north wall is...conditions (or reactions; Kissin 1 990b, 1991). Calcite Marble. This light-colored, massive, mediurn-grained...mediurn-grained marble is composed of anhedral calcite crystals. Polysynthetic twinning is rare. It contains less...is not found in this type of marble. Magnesian Calcite Marble. This marble is typically variegated light...aggregates of inedium- to coarse-grained euhedral calcite crystals that are highly deformed and do exhibit |
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