 | | Journal (article/letter/editorial) | | exception. KEYWORDS : gems, diamond, emerald, sapphire, ruby, geochemistry, exploration INTRODUCTION Gems (defi...example, a corundum crystal is not a gemstone (e.g. ruby, sapphire) unless it formed in an environment that...(GIA) 5345 Armada Drive, Carlsbad, California 92008, USA E-mail: blaurs@gia.edu E LEMENTS , V OL . 5, PP...chemical composition. Examples include diamond (C), ruby (red gem corundum, Al2O3), sapphire (any other color...color of gem corundum), and emerald (green chromium/ vanadium-bearing gem beryl, Be3Al2Si6O18). One notable |  | | Report (volume) | | Continued. Replacement veins Continued. Page. 1 Montana and Surprise claims and other prospects near the...neighboring prospects........................... Park City district.....................................Continued. Park City district Continued. Mines and prospects Continued. Lodes Continued. Page. Park and Central...138 138 138 139 139 139 139 139 140 Stotesbury prospect. ........ .^........................ 140 Placers..................................... Dixie Queen, Ruby, Neglected, Reserve, and Santa Claus.... White Rose |  | | Report (edition) | | ............................. 247 Desert gold prospect.................................................blue-green elbaite gemstone from the Dalglish prospect near Spargoville.................................... 107 Rose quartz site at Depot Rocks West prospect in the Kambalda region .........................173 19.3 Alexandrite crystals from the Dowerin prospect .............................................................................. 179 Fragments of ruby and sapphire from Poona ....................... |  | Graham, Ian, Sutherland, Lin, Zaw, Khin, Nechaev, Victor, Khanchuk, Alexander (2008) Advances in our understanding of the gem corundum deposits of the West Pacific continental margins intraplate basaltic fields. Ore Geology Reviews, 34 (1) 200-215 doi:10.1016/j.oregeorev.2008.04.006 | Journal (article/letter/editorial) | | Available online 3 June 2008 Keywords: Basalt Sapphire Ruby Zircon Continental margins West Pacific A B S T...our knowledge of the basalt-derived gem sapphire–ruby–zircon deposits. In this paper we focus on the Late... E., 2003. Ar–Ar and U–Pb ages of marble-hosted ruby deposits from Central and South-east Asia. Geophysical... Hoang Quang, V., 2005a. Age and significance of ruby-bearing marble from the Red River Shear Zone, Northern...200–215 Fig. 2. (A) View of palaeoalluvial open-cut ruby mining operations, Gummi Flat, Barrington Tops, |  | | Report (edition) | | ............................. 52 The Dalglish prospect in the Spargoville area ........................blue-green elbaite gemstone from the Dalglish prospect near Spargoville...................... 53 Geology....... 106 Rose quartz site at Depot Rocks West prospect in the Kambalda region............................................................. 119 Green chromium-rich opal collected east of Laverton............... 181 Alexandrite crystals from the Dowerin prospect.............................................. |  | | Book | | are reported by county of occurrence. Map 1-2 shows the county boundaries and county names. When possible...,o Map 1-2. Outline map of California showing county boundaries. __ _) 4 MINERALS OF CALIFORNIA...Cadmium Calcium Carbon Cerium Cesium Chlorine Chromium Cobalt Columbium Copper Dysprosium Erbium Europium...in placers of the Potholes District of Imperial County, near the Colorado River about 10 miles north of...reported from San Ysidro, San Diego County, in 1828 ; from Los Angeles County, San Francisquito Canyon, in 183 |
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