 | | Journal (article/letter/editorial) | | overlap with the record established from cratonic garnet peridotite xenoliths and xenocrysts but reflect...indicate polybaric melt extraction proceeding from the garnet into the spinel stability fields, most readily explained...mineralogical layers, spinel facies (lilac) and garnet facies (purple to pink). Small volume melt fractions...De Beers Pool (both in South Africa) peridotitic garnet inclusions are common, whilst at Orapa (Botswana)...given for garnet inclusions to account for the non-ideal interaction of Ca with Mg or Fe in garnet (O'Neill |  | | Book | | De Beers Consolidated Mines SPONSORS Bateman Group (including Bateman Process Equipment, Bateman Minerals...Bateman Materials Handling) Rio Tinto Trans Hex Group Ltd CONTRIBUTORS Council for Geoscience (Geological...Pressures and Temperatures. Relationships between garnet and clinopyroxene in Vitim mantle xenoliths: evidence...Macrocrysts and their Inclusions, Guaniamo Kimberlite Field, Venezuela. Primary and related diamond occurrences...of Carbon Recycling. The Guaniamo diamond region, Bolivar state, Venezuela: a new kimberlite province |  | Vielzeuf, Daniel, Champenois, Michel, Valley, John W., Brunet, Fabrice, Devidal, J.L. (2005) SIMS analyses of oxygen isotopes: Matrix effects in Fe–Mg–Ca garnets. Chemical Geology, 223 (4) 208-226 doi:10.1016/j.chemgeo.2005.07.008 | Journal (article/letter/editorial) | | SIMS measurements, we gathered 6 commonly used garnet standards and prepared 6 others to adequately cover...single session, IMF can vary up to 6.3x from one garnet standard to another. In most of the sessions, IMF...IMF and correct the measured isotopic ratio of a garnet of known chemical composition. This way, we were...reproduce the d 18O values of most of the Fe–Mg–Ca garnet standards within F 0.6x. Interestingly, the use...end-member standards is satisfactory in the case of the garnet solid-solutions. Two studies carried out on zoned |  | | Journal (issue) | | the mining family washing the gravel. Fig. 5. A group of gem (?) vendors at Khau Ploy Waen, near Chantaburi...Refractive Indices Higher than 1.81 YAG Demantoid Garnet Zircon (High) Sphene GGG Cubic Zirconia Strontium...amazonite and oligoclase, also gaylussite. The garnet group is represented by almandines, which are found...Australia. M.O'D. BROWN (G.). Gemmological study group report on a new opal imitation. Australian Gemmologist...celebrated for the superb crystals of grossular garnet, some 546 J.Gemm., 1979, XVI, 8 of which are |  | | Journal (issue) | | Shane Elen, and Sam Muhlmeister 108 Sapphire and Garnet from Kalalani, Tanga Province, Tanzania Antonin... diamond, cubic zirconia, and yttrium aluminum garnet (YAG). In fact, when the oxide film reaches a certain...is remembered for his comprehensive articles on garnet classification, which he coauthored with G&G technical...other and to the same oxygen; bonds in this epoxide group break in order for the prepolymers to be linked...About 1.52 Inert Inert Solid Rarely IR group, Raman group, spectrum g spectrum g OTHER OILS Mineral |  | | Journal (issue) | | crystals are hexagonal, of wurtzite structure, space group P63mc, with a = 3.250 Å, c = 5.207 Å; Z = 2. Refractive...some rocks previously assigned to the George River Group (Raeside, 1989), considered the oldest rocks in...Breton Island; main occurrences of George River Group rocks (BH - Boisdale Hills, NM - North Mountain...and Barr (1990) as distinct from the George River Group (Figure 1). For the purpose of this report, however...focus here is on a small window of the George River Group, centred in the Boisdale Hills, a locality which |  | | Journal (issue) | | inclusions • Unusual orange pyrope-spessartine-grossular garnet • New plastic opal imitation from Kyocera • Natural...add GST. Discounts are available for renewals, group subscriptions, GIA alumni, and current GIA students...materials such as Russian and Namibian demantoid garnet, fine opal, Oregon sunstone, and turquoise from...have been alluvial deposits in Brazil, Guyana, Venezuela, Zimbabwe, the Central African Republic, and India...observations on green diamonds colored by each group of defects. Keep in mind that it is not uncommon |  | | Book | | vii Chapter 15. Scanning Electron Microscopy of Garnet from Southern Michigan Soils: Etching Rates and...Successions: An Example from the Sherwood Sandstone Group (Triassic) of the East Irish Sea Basin and Surrounding...Valley et al., 2002; Iizuka et al. 2006). Zircon, garnet, monazite, apatite, sphene (titanite), just to...occurrence of essential rock-forming minerals (e.g. garnet, pyroxenes, micas) or accessories (e.g. zircon...tourmaline cores preserving a pre-existing phase, garnet zoning and, probably the most well-known, the complex |  | | Book (edition) | | to the chemical formula, allegiance to a mineral group, symmetry and crystal structure as well as the strongest...chemical formula, structure (crystal system, space group, and unit cell dimensions), and at least some other...site occupancy. The Sb members of the tennantite group (2.G) will serve as a good example: tetrahedrite...registered in this book (e.g. in the amphibole group). For more detailed information see "Dana's System...) 6-21 %. VHN(synth.) (10.C. purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite |  | | Book | | . . . . . . . . . . . . . . . . . . . Calcite Group, 3̄2/m . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . Aragonite Group, 2/m2/m2/m. . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . Dolomite Group. . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . Azurite-Malachite Group. . . . . . . . . . . . . . . . . . . . . . . . ...different directions (. Fig. 1.3). . Fig. 1.1 Group of quartz crystals, Arkansas, USA, approximately |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Species containing more than one anion or anion group may be assigned to a separate class or may be assigned...specifies the atomic (cation to anion, or to anion group) ratio for the mineral. This and the remaining numbers...appropriate Dana number. When recognized, membership in a group is noted. Occasionally, the phrase “an inadequately...internally contradictory. 5A. Groups The term group refers to an aggregate or multiple (usually three...identical or closely similar structure and chemistry. A group may be named when there are several end members |
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