 | | Journal (issue) | | 7, Jul y 2003 ISSN : 1355-4565 An anorthite-ruby-pargasitepicotite assemblage Dr Karl Schmetzer 1...microprobe analyses, ruby 385 Introduction I n the mid-1990s, cabochons composed of ruby crystals in a transparent...components of this mineral assemblage. Figure 1: Ruby crystals in a matrix of colourless anorthite. Size...left: 213 x 163 mm; photo by M. Glas. JM Figure 3: Ruby and pargasite crystals in a matrix of colourless...Gemm., 2003, 28, 7, 385-391 Occasionally, the ruby crystals appear as if several platelets of different |  | | Journal (issue) | | Authors ABOUT THE COVER: One of the most important ruby localities o f the 1990s covers a broad orea near...d u n l in Allcali Basalt: O r i g i n a n d Occurrence," by Drs. Levinson and Cook, in the Winter 1994...which we described thc occurrence of sapphircs and zircons of the Jemaa district, in central Nigeria. We...ince 1992, Mong Hsu has been a primary source of ruby available in Thailand (figure 1).Mong Hsu is a small...with dark violet to almost black sapphire cores and ruby rims (figure 2). With heat treatment, the violet |  | | Report (issue) | | Synonyms and Other Names or Spellings Deposit or District Name Province Latitude Longitude Commodity(s)...the name of the mine, deposit, field, area, or occurrence being described. Synonyms and Other Names or...might also 5 include any specific mine or occurrence names that are known, i.e. "includes Northern...Deposit or District Name field contains the name of any larger deposit, field, or district to which the...site has produced and when or if it is a mineral occurrence or showing. Host Rock Age and Host Rock contain |  | | Book | | Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam Reprinted from: Minerals 2018, 8...Mazlinfalina Mohd Zin and Stephen J. Harris Diversity in Ruby Geochemistry and Its Inclusions: Intra- and Inter-...Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights...as a late magmatic accessory phase from Mexico, Tanzania, and Vietnam. Differences in the rare earth elements...can be found in various places around the globe. Ruby is the red variety and sapphire is the blue variety |  | | Book | | . . . . . . . . . . . . . . . . . . Mode of Occurrence. . . . . . . . . . . . . . . . . . . . . . ....Classification of Minerals – 34 2.3 Mode of Occurrence – 35 2.4 Rock-Forming and Economic Minerals...However, the chemical and 35 2.3 · Mode of Occurrence based on a combination of chemical and structural...examples for subdivisions are listed. 2.3 Mode of Occurrence For describing and identifying a mineral, not...chemical properties are of interest, but also its occurrence in nature. This knowledge is indispensable for |  | | Journal (issue) | | Shigley, and Y a n Liu NOTES AND NEW TECHNIQUES Ruby and Sapphire from the Southern Ural Mountains, Russia...Kissin Gem Corundum in Alkali Basalt: Origin and Occurrence A. A. Levinson and P. A. Cook REGULAR FEATURES...characteristic color of the diamond in the proper region of color space, so the GIA GTL color-description...terminology boundaries are due to the natural occurrence and relative rarity of various diamond colors...THE By Alexander J. Kissin Primary occurrences of ruby, pink sapphire, sapphires of other colors, and spinel |  | | Book | | corundum are of particular interest, above all in the ruby variety. These are very occasionally seen in the...vitreous waxy pearly silky metallic diamond, zircon ruby, emerald, quartz turquoise moonstone gypsum hematite...(carbon for diamond) or oxides (of aluminum for ruby and sapphire, iron for hematite, silicon for quartz...different varieties of the same crystal type, e.g. ruby and sapphire, which differ in color but have the...”’ is primarily mineralogical, if, for example, a ruby needs to be distinguished from a garnet or spinel |  | | Report (volume) | | Nome and Norton Bay regions 3 30 Copper River district 3 30 Logarithm tables 3 Regulations 30 3 Instructions...report on the lead and zinc deposits of the Ozark region, by H. F. Bain, with an introduction by C. R. Van...xxvi-xli. Geology and ore deposits of Elkhorn mining district, Jefferson County, Mont., by W. H. Weed, with...Price, 85 cents. XLIII. The Mesabi iron-bearing district of Minnesota, by C. K. Leith. 1903. 316 pp., 33...pls. Price, $1. XLV. The Vermilion iron-bearing district of Minnesota, with atlas, by J. M. Clements. 1903 |  | | Book (volume) | | STONES A POPULAR ACCOUNT OF THEIR CHARACTERS, OCCURRENCE AND APPLICATIONS WITH AN INTRODUCTION TO THEIR...that the nearest occurrence of mica was over 200 miles away and the nearest occurrence of obsidian over...over 1500 miles away in the region of the Yellowstone River The past several centuries have seen the rise...artificial gemstones has made immense strides. Synthetic ruby, sapphire, star sapphire, emerald, spinel, rutile...mammals. 382, line 27. A more recent United States occurrence of opal is at Virgin Valley, Nevada. Stones from |  | | Journal (issue) | | composition. p. 321 354 Mineral Inclusions in Ruby and Sapphire from the Bo Welu Gem Deposit in Chanthaburi...abalone shell blister • Large laboratory-grown star ruby and sapphire • Laboratory-grown sapphire with unusual...inclusions • Merelaniite in gem diopside from Merelani, Tanzania • Dravite from Mozambique with pyrite inclusions...Hyderabad contains emerald, ruby (including some recently replaced treated ruby), and Damascus steel with...merchants were particularly successful with the ruby trade from the city of Pegu (in modern-day Myanmar) |  | | Report (volume) | | Digest of decisions concerning water in the arid region.............. Special reports on Alaska .........etc. (published in 1899)....;.. Cape Nome Gold Region (published in 1900)................... Index to...viii-ix. The physical geology of the Grand Canon district, by Clarence E. Button, pp. 47-166, pis. x-xxxvi...of'the geology of the Comstock lode and the Wash oe district, by George F. Becker, pp. 291-330, pis. xlvi-xlvii...xviii-xxiii. Abstract of report on'geology of the Eureka district, Nevada, by Arnold Hague, pp. 237-290, pis. xxiv-xxv |  | | Journal (volume) | | of Szeged On the cover: Map of the Carpathian region with type localities of new mineral species, rocks...History of mineralogy: The role of the Carpathian region in the 18th century..............................investigation of redox processes. For Fe, the pre-edge region provides an almost direct way of quantifying the...investigations. Fig. 1: Optical micrograph showing occurrence of the outermost limefree zone (I), the transition...individual clinker minerals can indicate the modes of occurrence of elements commonly absent in usual fuels or |
|
