 | Mikhail, S., McCubbin, F. M., Jenner, F. E., Shirey, S. B., Rumble, D., Bowden, R. (2019) Diamondites: evidence for a distinct tectono-thermal diamond-forming event beneath the Kaapvaal craton. Contributions to Mineralogy and Petrology, 174 (8) doi:10.1007/s00410-019-1608-0 | Journal (article/letter/editorial) | | Diamondites: evidence for a distinct tectono‑thermal diamond‑forming event beneath the Kaapvaal craton S. Mikhail1...yet would potentially reveal new aspects of how diamond-forming fluids are transported through the lithosphere...patterns fit an equilibrium model suggesting the diamond-forming fluid shares an affinity with high-density...carbon-bearing subducted crustal source(s) for the diamond- and garnet-forming media. The nitrogen aggregation...pre-dates fibrous diamond-formation and post-dates most of the gem monocrystalline diamond-formation events |  | | Journal (article/letter/editorial) | | MA 02543, USA. Geophysical Laboratory, Carnegie Inst. Washington, Washington, D. C. 20015, USA. Inst. Mineral...Shimizu and Richardson; Griffin et al., 1992; 1993). Diamond inclusion garnets of the 'peridotitic' affinity...dunite which show progressive chemical changes from diamond inclusion-like characteristics in the core to 'normal'...with chemically zoned diamond inclusion garnets. It is an attempt to put diamond inclusion garnets into...across) unfragmented garnet inclusion from a Mir diamond (MR 129/15) was found to be zoned as illustrated |  | | Book | | NATUREGUIDE TOURMALINE THE WORLD DIAMOND TURQUOISE IN YOUR PINK SAPPHIRE HANDS NATUREGU|...unique possibilities—whether it is the sparkle of diamond, the rainbow colors of opal, or the subtle pastels...use of gems, as seen in this Opal, sapphire, and diamond brooch, increases their value. Colorful sapphires...collectors. DIAMOND RING BLUE JOHN RING Hardness, brittleness, and cleavability Diamond is the hardest...magma. Gems such as peridot and The rock cycle diamond crystallize directly from the magma as part of |  | | Journal (issue) | | Spinel from Tanzania Nephrite Jade from Washington State, USA Copper Minerals in Chalcedony from Indonesia... What’s New Big Sherlock Diamond Detector | Gemtrue Arete Synthetic Diamond Tester | Geospatial Analysis...Demand Trends 2022 | Grassroots Research on Local Diamond Mining Impact Project | JNA’s Gemsworld 2023 |...Bibliography Lists Updated | Laboratory-grown Diamond Market Research Report | Gem Connection Podcasts...Tanzania Nephrite Jade from Washingto n State, USA Copper Mine rals in Chalcedon y from Indon esia |  | | Journal (article/letter/editorial) | | Carnegie Institution of Washington, 5241 Broad Branch Road, N.W., Washington, DC, 20015 USA e-mail: carlson@dtm...Carnegie Institution of Washington, 5241 Broad Branch Road, N.W., Washington, DC, 20015 USA e-mail: shirey@dtm...Carnegie Institution of Washington, 5241 Broad Branch Road, N.W., Washington, DC, 20015 USA e-mail: hauri@dtm...N- and H-rich cubic diamond alternating with zones of N-poor octahedral diamond. These growth features...different levels of carbon supersaturation in the diamond forming fluid(s). The diamonds are younger than |  | | Journal (article/letter/editorial) | | 11794-2100, USA 2 Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA Received...transition f r o m graphite to so-called hexagonal diamond phase has been reported previously (Aust and Drickamer...Geophys., Univ. of California, Berkeley, CA 94720, USA Correspondence to: Xiaoyuan Li of the chemical bonding...carbon rods obtained from Ultra Carbon Corporation, USA. All the samples have a purity of 99.9995%. The density...split-sphere apparatus, we also use a MaoBell type diamond anvil cell in studying the phase transition in |  | | Report (issue) | | Pasteris Department of Earth and Planetary Sciences Washington University St. Louis, Missouri 63130 SPECIAL...Sciences, McDonnell Center for the Space Sciences, Washington University, Box 1169, St. Louis, Missouri 63130... Richardson’s dating of a garnet inclusion in diamond at 3,200 Ma. Suggested new fields of investigation...garnet, copious graphite flakes, and numerous diamond oc- tahedra. The silicate crystals are weakly...discovered to have more graphite at one end and more diamond at the other end (Hatton and Gurney, 1979). A thin |  | | Journal (article/letter/editorial) | | www.elsevier.comrlocaterchemgeo Hydrothermal diamond anvil cell for XAFS studies of first-row transition...Sciences, Cornell UniÕersity, Ithaca, NY 14853, USA Department of Geology, St. Francis XaÕier UniÕersity...Springfield, MO 65804, USA d MS 955, US Geological SurÕey, Reston, VA 20192, USA Received 20 November...November 1998 Abstract A hydrothermal diamond anvil cell ŽHDAC. has been modified by drilling holes with a laser...loss of X-rays due to absorption and scatter by diamond. This modification enables acquisition of K-edge |  | | Journal (article/letter/editorial) | | Susan Brantley (Pennsylvania State University, USA) Volume 15, Number 1 (February) PLANET MERCURY Guest...Mercury Rebecca J. Thomas (University of Colorado, USA) and David A. Rothery (The Open University, UK) •...Institution of Washington, USA) and Shoshana Z. Weider (Carnegie Institution of Washington, USA) • Mercury:...Guest Editors : Kate Maher (Stanford University, USA) and K. Ulrich Mayer (University of British Columbia...Urbana Champaign, USA) and Matthew J. Winnick (University of Massachusetts, Amherst, USA) E lements • |  | | Journal (article/letter/editorial) | | Geology Department, Western Washington University, Bellingham WA 98225, USA; mustoeg@wwu.edu; Tel.: +1-360-650-3582...longaeva) growing in White Mountains of California USA; a tree core taken in 2012 was observed to have 5067...Aspen (Populus tremuloides) grove in central Utah, USA [2]. The ages of these living trees are brief in...a Tescan Vega SEM at Western Washington University, Bellingham, WA USA. Geosciences 2018, 8, 223; doi:10...3. Mummified at Western Wood Washington University, Bellingham, WA USA. A common question asked of fossil |  | | Journal (article/letter/editorial) | | Urbana-Champaign 1301 West Green Street, Urbana, IL 61801, USA E-mail: jaybass@uiuc.edu 2 HPCAT and Geophysical...Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA E-mail: ssinog@hpcat.aps.anl.gov...Stony Brook University Stony Brook, NY 11794-2100, USA E-mail: bli@notes.cc.sunysb.edu ELEMENTS, VOL. 4...given in a review by Bass (2007). Diamond Anvil Cell The diamond anvil cell (DAC) is probably the most...due to its simplicity and the transparency of diamond. Pressure is generated by compressing samples between |  | | Journal (article/letter/editorial) | | use in situ Raman spectroscopy in laser-heated diamond anvil cells to monitor the chemical reactivity...before complete dissociation into diamond and hydrogen. Earlier diamond anvil cell (DAC) experiments15–19...Supplementary Table S1). a b Probe Laser heating Diamond anvils Ruby Sample Coupler Gasket Figure 1 |...Carnegie Institution of Washington, Washington, District of Columbia 20015, USA, 2 Lomonosov Moscow State...(cm¬1) Raman shift (cm¬1) 50 µm b c C2H6 Diamond anvils C C2H6 C3H8 C4H10 Position 1 H2 H2 |  | | Journal (issue) | | located at Silver Reef in southwestern Utah’s Washington County (figure 1) is a very unique occurrence...impregnating Sandstone, Silver Reef District, Washington Co., UT, 6 x 5 x 3 cm. Author’s specimen. The...perfect bound for just: $35.00 Postage $5.00 in the USA; $23 for foreign. Excalibur Mineral Corp Tel: 434-964-0875...Continued-Collecting Underground Postcards Coppertown USA Mining Museum Badger Mine and Museum - Shullsburg...Themed Welcome Center The World of Minerals – Diamond Revelations Collecting on the Island of Seiland |  | ROSS, Aidan J., STEELE, Andrew, FRIES, Marc D., KATER, Lukas, DOWNES, Hilary, JONES, Adrian P., SMITH, Caroline L., JENNISKENS, Peter M., ZOLENSKY, Michael E., SHADDAD, Muawia H. (2011) MicroRaman spectroscopy of diamond and graphite in Almahata Sitta and comparison with other ureilites. Meteoritics & Planetary Science, 46 (3) 364-378 doi:10.1111/j.1945-5100.2010.01157.x | Journal (article/letter/editorial) | | 1945-5100.2010.01157.x MicroRaman spectroscopy of diamond and graphite in Almahata Sitta and comparison with...Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA 4 Planetary...Institute, 1700 E. Ft. Lowell, Tucson, Arizona 85719, USA 5 Jet Propulsion Laboratory, M ⁄ S 183-301, 4800...4800 Oak Grove Drive, Pasadena, California 91109, USA 6 Department of Geographical and Earth Sciences, University...California 94043, USA 8 NASA Johnson Space Center, Mail Code KT, Houston, Texas 77058, USA 9 Department of |  | Pearson, D. G., Boyd, F. R., Haggerty, S. E., Pasteris, J. D., Field, S. W., Nixon, P. H., Pokhilenko, N. P. (1994) The characterisation and origin of graphite in cratonic lithospheric mantle: a petrological carbon isotope and Raman spectroscopic study. Contributions to Mineralogy and Petrology, 115 (4) 449-466 doi:10.1007/bf00320978 | Journal (article/letter/editorial) | | Carnegie Institution of Washington, 5241 Broad Bra'nch Rd, N.W. Washington, DC 20015, USA 2 GeophysicalLaboratory...CarnegieInstitution of Washington, 5251 Broad Branch Rd, N.W. Washington,DC 20015, USA 3 Department of Geology...01003, USA Department of Earth and PlanetarySciences,WashingtonUniversity, St. Louis, MO 63130, USA 5 Departmentof...Geology,Stockton State College,Pomona,NJ 08240, USA 6 Departmentof Earth Sciences,Universityof Leeds...range displayed by peridotite-suite graphite and diamond encompasses the carbon isotope range observed in |  | | Journal (article/letter/editorial) | | gems Mining Certification Anti-terrorism Tanzania USA Patriot Act a b s t r a c t Shortly after the September...inflected by new security provisions embodied in the USA Patriot Act. Ó 2009 Elsevier Ltd. All rights reserved...third section describes the impact of the blood diamond controversy on the principal tanzanite mining corporation...laundering rules governing gemstone traders under the USA Patriot Act, an official state-sanctioned ‘‘fourth...innocent West African civilians during the so-called diamond wars in Sierra Leone and Liberia, for example, |  | | Journal (issue) | | COLUMNS 1 p. 22 What’s New DiamondDect for diamond identification|Triple D photo kit|Upgraded DiamondView|Variofoc...Newsletter|Large CVD synthetic diamond seen by HRD Antwerp|MAGI diamond type report|SSEF Facette|Updated...inclusion in pink spinel|Spurrite from New Mexico, USA|Tsavorite mining at the Scorpion mine, Kenya|Mussel...The Great Mughal and the Orlov: One and the Same Diamond? By Anna Malecka Gemmological Brief 64 A Lead-Glass-Filled...Heasley Museum, Cornell University, Ithaca, New York, USA; composite photo by Jeff Scovil. Feature Articles |  | | Journal (article/letter/editorial) | | also identify novel mechanisms that can lead to diamond formation and the variability of carbon isotopic...subduction zones10,11 , and mantle metasomatism and diamond formation11 . However, quantitative theoretical...21218, USA. 2 Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA. *e-mail:...aqueous carbon speciation in equilibrium with diamond, jadeite, pyrope, kyanite and coesite at QFM−2...with a model metasedimentary eclogite containing diamond, jadeite, pyrope, kyanite, and coesite. At 5.0 |  | | Journal (issue) | | News, P.O. Box 2043, Coeur d'Alene, ID 83816-2043 USA Phone: 208-664-2448 • 3 E-mail: lream@comtch.iea...Bahia, the largest cut gem sculpture in the world; diamond and semi-precious stone cutting; and a select group...Diamonds is a work that covers all aspects of diamond from its formation and geologic environments, through...This volume ~eflects the educational value of the diamond exhibit at the American Museum of Natural History...expert in a separate field of diamond study and knowledge: I - What is Diamond? George E Harlow, 2 - The |  | Dobrzhinetskaya, L. F., Green, H. W., Bozhilov, K. N., Mitchell, T. E., Dickerson, R. M. (2003) Crystallization environment of Kazakhstan microdiamond: evidence from nanometric inclusions and mineral associations. Journal of Metamorphic Geology, 21 (5) 425-437 doi:10.1046/j.1525-1314.2003.00452.x | Journal (article/letter/editorial) | | University of California, Riverside, CA, 92521, USA (Larissa@ucrac1.ucr.edu) 3 Science and Technology...Los Alamos, NM, 87545, USA ABSTRACT Nanometric solid inclusions in diamond incorporated in garnet and...pockets of multiple inclusions, which consist of 1–3 diamond crystals intergrown with quartz, phengite, phlogopite...Transmission electron microscopy revealed that the diamond contains abundant nanocrystalline inclusions of... rare carbonates and silicates. Within the 15 diamond crystals studied, abundant inclusions were found |  | Wang, Suntao, Meng, Yu-fei, Ando, Nozomi, Tate, Mark, Krasnicki, Szczesny, Yan, Chih-shiue, Liang, Qi, Lai, Joseph, Mao, Ho-kwang, Gruner, Sol M., Hemley, Russell J. (2012) Single-crystal CVD diamonds as small-angle X-ray scattering windows for high-pressure research. Journal of Applied Crystallography, 45 (3). 453-457 doi:10.1107/s0021889812010722 | Journal (article/letter/editorial) | | State Physics, Cornell University, Ithaca, NY 14853, USA, bCornell High Energy Synchrotron Source (CHESS)...14853, USA, c Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA, and...Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Correspondence e-mail: smg26@cornell.edu, rhemley@ciw...7.5 mm-thick Kapton film. A single-crystal CVD diamond window was successfully used in a high-pressure...SAXS windows are made of low-Z materials such as diamond or beryllium, or very thin layers of Kapton, Mylar |  | Zha, Chang-sheng, Duffy, Thomas S., Mao, Ho-kwang, Downs, Robert T., Hemley, Russell J., Weidner, Donald J. (1997) Single-crystal elasticity of β-Mg2SiO4 to the pressure of the 410 km seismic discontinuity in the Earth's mantle. Earth and Planetary Science Letters, 147 (1) doi:10.1016/s0012-821x(97)00010-1 | Journal (article/letter/editorial) | | Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, USA b Department of Geosciences...NJ 08544, USA ’ Department of GeologicalSciences, Uniuersizy of Arizona, Tucson, AZ 85721, USA ’ Department...Uniuersit?, of New York, Stony Brook, NY 11794, USA Received 2 December 1996; revised 7 January 1997:...were measured using Brillouin scattering in a diamond anvil cell. There are a number of potential problems...as the shear peaks from the diamond anvils. Since the volume of diamond is much larger than the volume |  | Ohta, M, Mock, T, Ogasawara, Y, Rumble, D (2003) Oxygen, carbon, and strontium isotope geochemistry of diamond-bearing carbonate rocks from Kumdy-Kol, Kokchetav Massif, Kazakhstan. Lithos, 70 (3) 77-90 doi:10.1016/s0024-4937(03)00093-8 | Journal (article/letter/editorial) | | carbon, and strontium isotope geochemistry of diamond-bearing carbonate rocks from Kumdy-Kol, Kokchetav...NW, Washington, DC 20015-1305, USA c Geophysical Laboratory, Carnegie Institution of Washington, 5251...5251 Broad Branch Road, NW, Washington, DC 2015-1305, USA b Abstract Diamond-bearing carbonate rocks from...minerals, replacement of diamond by graphite and of dolomite by calcite. Diamond-bearing carbonate rocks...measurements of 13C/12C fractionation between coexisting diamond and carbonate. Our study adequately documents alteration |  | | Journal (article/letter/editorial) | | of Washington, Box 351650, Seattle, WA 98195, USA b Geophysics Program, University of Washington, Box...Box 351650, Seattle, WA 98195, USA Received 11 November 1997; revised version received 6 August 1998;...function of temperature and pressure in the heated diamond-anvil high-pressure cell. The equation of state...pressure– temperature plane accessible in the diamond-anvil cell have not yet been investigated. Laser-induced...the equation of state of fluids in the heated diamond-anvil cell [13,14]. We report here a study of the |  | | Journal (article/letter/editorial) | | Survey, Reston, Virginia, USA 22092 and Smithsonian Institution, Washington, D.C., USA ABSTRACT A hypabyssal...hypabyssal kimberlite dike in southwestern Pennsylvania (USA), emplaced through Proterozoic basement and Phanerozic...170 km) indicate some sampling in the field of diamond stability. Diamonds have not been reported, however...spinel (<56.0 wt.% Cr2O3) are consistent with diamond absence and the off-craton tectonic setting of...mantle, Ca-ferrite, diamond, UHP, Grenville. INTRODUCTION Worldwide, most diamond-bearing kimberlites |
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