 | Krivovichev, Vladimir G., Kuksa, Katherine A., Sokolov, Pavel B., Marakhovskaya, Olga Yu., Zolotarev, Andrey A., Bocharov, Vladimir N., Semenova, Tatyana F., Klimacheva, Maria E., Gussiås, Geir Atle (2022) Preiswerkite: A First Occurrence in Marble Hosting Gem Spinel Deposits, Luc Yen, Vietnam. Minerals, 12 (8) 1024 doi:10.3390/min12081024 | Journal (article/letter/editorial) | | Occurrence in Marble Hosting Gem Spinel Deposits, Luc Yen, Vietnam Vladimir G. Krivovichev 1, * , Katherine A...Occurrence in Marble Hosting Gem Spinel Deposits, Luc Yen, Vietnam. Minerals 2022, 12, 1024. https:// doi.org/10...St. Petersburg, Russia BalderGems Co., Yen The YB 36000, Vietnam Correspondence: v.krivovichev@spbu.ru...marble-hosted noble spinel deposits of the Luc Yen district, northern Vietnam. It is found in marble for the first...solid-solution series. Compared with other occurrences, the Luc Yen preiswerkite has a low iron content, which attains |  | Garnier, Virginie, Giuliani, Gaston, Ohnenstetter, Daniel, Fallick, Anthony E., Dubessy, Jean, Banks, David, Vinh, Hoàng Quang, Lhomme, Thérèse, Maluski, Henri, Pêcher, Arnaud, Bakhsh, Kausar Allah, Long, Pham Van, Trinh, Phan Trong, Schwarz, Dietmar (2008) Marble-hosted ruby deposits from Central and Southeast Asia: Towards a new genetic model. Ore Geology Reviews, 34 (1) 169-191 doi:10.1016/j.oregeorev.2008.03.003 | Journal (article/letter/editorial) | | Geological Sciences, CNST, Nghia Dô, Câu Giây, Hanoi, Vietnam g Laboratoire de Géochronologie, Université de...Pakistan j Vietnam National Gem and Gold Corporation, 91 Dinh Tien Hoang street, Hanoi, Vietnam k Gübelin...tectonics that were active, from Afghanistan to Vietnam, between the Oligocene and the Pliocene. The petrography...for the deposits of Jegdalek, Hunza and northern Vietnam. Whole rock analyses of non-ruby-bearing marbles...Azad-Kashmir, Tajikistan, Nepal, Myanmar, northern Vietnam and southern China (Hughes, 1997; Fig. 1). The |  | | Journal (issue) | | INSTITUTE OF AMERICA Russia's Lomonosov Diamond Mine Carbonado Diamond PL Mapping of Optical Defects...article of this issue examines Russia’s Lomonosov mine, which is located in a Proterozoic zone in the Baltic... 2 EDITORIAL 143 Visit Europe’s First Diamond Mine Duncan Pay FEATURE ARTICLES 144 Geology and Development...well as the geology of the Arkhangelsk kimberlite province. 168 Carbonado Diamond: A Review of Properties...diamond. 190 An Update on Tourmaline from Luc Yen, Vietnam Nguy Tuyet Nhung, Le Thi Thu Huong, Nguyen |  | Giuliani, Gaston, Groat, Lee, Fallick, Anthony, Pignatelli, Isabella, Pardieu, Vincent (2020) Ruby Deposits: A Review and Geological Classification. Minerals, 10 (7) 597 doi:10.3390/min10070597 | Journal (article/letter/editorial) | | unheated rubies from the recently discovered Didy mine in Madagascar also command high prices [19]. A set...Minéral; (C) rubies from the Montepuez mine, from the Montepuez mine, Mozambique. Vincent Pardieu © Gemmological...(9) Kitui; Mangare (Rockland-formerly John Saul mine; Penny Lane; Aqua, Hard Rock). Tanzania: (10) Umba...Umba (9) Mangare (Rockland-formerly John Saul mine; Penny Lane; Aqua, Hard Rock). Tanzania: (10) Umba...(Fiskenæsset district(25) Revelstoke. Greenland: (26) South of Nuuk region (Fiskenæsset district-Aappaluttoq); |  | Giuliani, Gaston, Dubessy, Jean, Ohnenstetter, Daniel, Banks, David, Branquet, Yannick, Feneyrol, Julien, Fallick, Anthony E., Martelat, Jean-Emmanuel (2018) The role of evaporites in the formation of gems during metamorphism of carbonate platforms: a review. Mineralium Deposita, 53 (1) 1-20 doi:10.1007/s00126-017-0738-4 | Journal (article/letter/editorial) | | phlogopite in a marble matrix, Minh Tien mine, Luc Yen mining district, Vietnam, 2 × 1 cm. e Nodule, rough and...cut of tsavorite from the Tsavolite mine, Mangare mining district, Voi region, Kenya, diametre of the...mines, Arusha district, Tanzania. h Blue zoisite, variety tanzanite, Merelani, Arusha district, Tanzania...residues of dust not cleaned by the water jet in the mine. Photos b to d: Y. Branquet and Photo e: G. Giuliani...Kashmir, Tajikistan, Nepal, Myanmar, northern Vietnam and southern China (Garnier et al. 2008; Fig. 8) |  | Tran, Hoa Trong, Polyakov, Gleb V., Tran, Anh Tuan, Borisenko, Alexander S., Izokh, Andrey E., Balykin, Pavel A., Ngo, Phuong Thi, Pham, Dung Thi (2016) Intraplate Magmatism and Metallogeny of North Vietnam - Modern Approaches in Solid Earth Sciences No. 11. Springer International Publishing. doi:10.1007/978-3-319-25235-3 | Book | | Intraplate Magmatism and Metallogeny of North Vietnam Modern Approaches in Solid Earth Sciences Volume...Magmatism and Metallogeny of North Vietnam Trong-Hoa Tran Vietnam Academy of Science and Technology...Institute of Geological Sciences Hanoi, Vietnam Tuan-Anh Tran Vietnam Academy of Science and Technology Institute...Institute of Geological Sciences Hanoi, Vietnam Andrey E. Izokh Russian Academy of Science Institute of...Pham Vietnam Academy of Science and Technology Institute of Geological Sciences Hanoi, Vietnam Thi-Phuong |  | | Journal (issue) | | Heierman collection. Illinois- Kentucky Fluorspar District Symposium by the Friends of Mineralogy (Midwest...the closing of the Illinois-Kentucky fluorspar district that I organized at Indiana University Southeast...believed having a similar program in the fluorspar district would be ideal. However, the logistics behind...this year. In previous visits to the fluorspar district, I had made contact with Bill Frazer, the owner...(Azad Kashmir). Pakistan: Luc Yen. Quy Chau. northern Vietnam: Chumar-Ruyil district. 1epal; Jegdalek. Afghanistan: |  | | Journal (issue) | | Mining Rubies and Fancy Sapphires in Northern Vietnam Robert C. Kammerling, Alice S. Keller, Kenneth...1987 Gemstone Durability: Design to Display Wessels Mine Sugitite Three Notable Fancy-Color Diamonds The...tillavailable Fall 1991 Rubies and Fancy Sapphires from Vietnam New Rubies from Morogoro, Tanzania Bohemian Garnet-Today...Southern Africa Sunstone Labradorite from the Ponderosa Mine, Oregon Nontraditional Gemstone Cutting Nontransparent...Emerald Deposit Beryl Gem Nodules from the Bananal Mine "Opalite:" Plastic Imitation Opal Spring 1993 Queensland |  | | Journal (issue) | | spinel deposit of An Phu, Luc Yen Mining District, Yenbai Province, Vietnam . . . . . . . . . . . . ....crystal cluster on matrix, 6 cm tall, from the Tsumeb mine, Tsumeb, Namibia. Sandor Fuss collection (2004)...discovered on the 12th level of the Cresson mine, Cripple Creek district, Colorado in 1914 (see “The Cresson...Mineralogical Record, volume 37, May–June, 2006 Cresson mine manager Dick Roelofs showing the Cresson Vug to...school; he did his Master’s work at the Rueppele iron mine in Stanton, Missouri. He spent the years 1931–1932 |  | | Journal (issue) | | Aquamarine with Spodumene Inclusions from the Oceanview Mine, California, USA | Demantoid/ Andradite Slices from...Chatoyancy from Vietnam | Faceted Proustite from Chañarcillo, Chile | Blue Spinel Mining in Vietnam Cover photo:...project Photo by Jeff Scovil 206 Excursions Luc Yen, Vietnam Gem-A Notices 214 Learning Opportunities...‘Home Gemmology’, ‘Jewellery Industry Voices’ and ‘Mine to Design’. • Gem-A (London) has produced a series...the Oceanview Mine, California, USA Since 2000, mining operations at the Oceanview mine in Pala, San Diego |  | | Journal (issue) | | FEATURE ARTICLES 2 Blue Spinel from the Luc Yen District of Vietnam Boris Chauviré, Benjamin Rondeau, Emmanuel...Emmanuel Fritsch, Phillipe Ressigeac, and Jean-Luc Devidal pg. 3 Offers geological context and gemological...increasingly popular vivid blue spinel from northeast Vietnam. 18 The Chinese Soul in Contemporary Jewelry...gemological characteristics of blue spinel from Luc Yen, Vietnam. The centerpiece of the 18k yellow gold ring...olivine in marble matrix was seen at a mine in the Luc Yen district. Photo by Vincent Pardieu/GIA. Composite |  | | Book | | New Zealand, China and many parts of SE Asia (Vietnam, Laos, Cambodia, Malaysia, Thailand, Indonesia...indicating ruby within outcrops, miners working at mine sites and locals selling gemstones at source. These...Gem Tract and Nama, Kachin State, Myanmar; Luc Yen, Vietnam; Jegdalek, Afghanistan; Morogoro, Tanzania...elsewhere, such as in Australia, Colombia, Myanmar, Vietnam and Tajikistan. The present study suggests that...techniques in gemstone exploration at the Rockland Ruby Mine, Mangare area, S.E. Kenya. J. Geochem. Expl. 1997 |  | | Journal (issue) | | Cordillera in the Guavio-Macanal formation (Muzo mine and Cosquez mine). Banks et al. (2000) discovered that although...Sub-Saharan Africa, the emeralds of the Chantete mine have also been shown to have resulted from the magmatic...The Chantete mine is located in the Ndola Rural Protected Area of the Lufwanyama district in the Copperbelt...Copperbelt Province of Zambia. The Ndola region consists of a complex series of pegmatite dykes that penetrate...(biotite-phlogopite schist around talcmagnetite schist and tremolite-chloritemagnetite schist) (Coakley, 2001). In |  | | Journal (issue) | | 5)Al6(BO3)3[Si6O18](OH)3(OH) , (variety Rubellite ) , Pala mine , California , USA ( 5 cms) – , , , . 2. Spodumene...of spodumene ) , LiAl(SiO3)2 , Mawi , Laghman province , Afghanistan 12,5 X 6,2 X 3,3 cms – . 3 3....9. Rhodochrosite 10. Azurite , MnCO3 , Hotazel mine , Kalahari Desert manganese field , South Africa...grams – 13. Tourmaline , var. Elbaite , Himalaya mine, California , USA . Size 8,1X4X3,5 Ouro Preto ...HgS , , on dolomite crystals , Duyun , Guizhou province , China . (Specimen 3,8 X 3,6 X 1,1 cms ; crystal |  | | Journal (issue) | | Synthetic Emeralds A New Source of Danburite from Vietnam A Chart of Emerald Inclusions Winter 2016 VOLUME...393 A New Find of Danburite in the Luc Yen Mining Area, Vietnam Le Thi-Thu Huong, Laura M. Otter, Tobias...promising find of gem-quality danburite from Yen Bai Province, Vietnam. Our fourth article returns to the emerald...stone picture. Gemfields’ auctions from its Kagem mine have had a profound effect on the city’s emerald...demand 332 GEMS & GEMOLOGY n the colored gemstone mine-to-market journey, there are major trading centers |  | | Journal (issue) | | from the Tan Huong–Truc Lau Area, Yen Bai Province, Northern Vietnam Nguyen Ngoc Khoi, Chakkaphan Sutthirat...Tuyet Nhung Although not as well known as the Luc Yen district, this area is an important source of ruby...Afghanistan • Ammonite from Madagascar • Aquamarine from Vietnam • Chalcedony from Peru • Afghan emerald mining...characteristics of r uby and sapphire from Yen Ba i Province, in nor thern V ietnam. There is an ar ticle...FROM THE TAN HUONG–TRUC LAU AREA, YEN BAI PROVINCE, NORTHERN VIETNAM Nguyen Ngoc Khoi, Chakkaphan Sutthirat |  | | Journal (issue) | | got the analysis we had been waiting for, although mine is still pending further analysis. It is a pleasure...specific topics, dinosaurs, geology of chalk, fossils, mine locations, gems and gem trails and of course David’s...the nearby Ball Gate David found a bit of green tremolite/actinolite, whetting his interest in the forgotten...had been told about a lost South Brent magnetite mine. There is a 1667 record of one Dr. Edward Cotton...medieval chapel. There was no obvious magnetite mine but David did find greenish boulders that told him |  | | Journal (article/letter/editorial) | | with locally abundant phlogopite, nepheline, tremolite, and scapolite, and common subordinate pyrite...although the exact origin of the Soper River mica mine and Waddell Bay occurrences could not be assessed...occur in fluorescent scapolite in the Grenville Province, New York State, USA (Belley et al., 2017). An...mode of cobalt enrichment at an occurrence in Vietnam, where cobalt is thought to have been leached from...different in situ vivid blue spinel deposit in Vietnam (P. Belley, unpublished data) suggests that cobalt |  | | Journal (article/letter/editorial) | | eluvial and alluvial deposits in the Luc Yen District, Vietnam (including cobalt-blue spinel; Chauviré...occurrence Soper Lake camp marble Soper Lake mica mine Qila occurrence Trailside occurrence Waddell Bay...Stockton (1984). Vibrant cobalt-blue spinel from Vietnam has a Fe/Co ratio of 10, 1236 lg/g Co, ~2500 lg/g...zoisite/clinozoisite and then coarse-grained tremolite (Fig. 4C; minerals identified by EDS). Markham...(Mrg), zoisite or clinozoisite (Zs/Czs), and tremolite (Tr). Spinel Island, Markham Bay. Backscattered |  | | Journal (issue) | | showing us a rough spinel sample in Yen Bai mining area, Vietnam. Photo © Luc Phan, SSEF FACETTE 2012 · 4 ... Jadeite jade necklace from Burma. lite and tremolite (amphiboles). In the Chinese understanding, the...marbles (Lantian jade, Yuchuan quarry in the Shaanxi Province). Despite all the differences, the common understanding...colour of jadeite, also poetically described the tremolite-actinolite series, with a general formula as...leads to Nephrite consisting mainly of Mg-rich tremolite is white. Such a rather dull green colour becoming |  | Garnier, V., Ohnenstetter, D., Giuliani, G., Blanc, P., Schwarz, D. (2002) Mineralogy and Petrology, 76 (3) 179-193 doi:10.1007/s007100200040 | Journal (article/letter/editorial) | | has been described in purple-pink sapphire from Vietnam (Koivula et al., 1994), in corundums (Henn and...Bank, 1996) and in rubies respectively from Luc Yen, Vietnam and Mong Hsu, Myanmar (Mullenmeister and... dravite, quartz, white mica, andalusite and tremolite. These mineral assemblages are similar to those...like Mogok in Myanmar (Burma; Iyer, 1953), Luc Yen in Vietnam (Kane et al., 1991), Hunza in Pakistan (Gubelin...Koivula JI (1991) Rubies and fancy sapphires from Vietnam. Gems & Gemology 27: 136±155 Koivula JI, Kammerling |  | Voudouris, Panagiotis, Mavrogonatos, Constantinos, Graham, Ian, Giuliani, Gaston, Melfos, Vasilios, Karampelas, Stefanos, Karantoni, Vilelmini, Wang, Kandy, Tarantola, Alexandre, Zaw, Khin, Meffre, Sebastien, Klemme, Stephan, Berndt, Jasper, Heidrich, Stefanie, Zaccarini, Federica, Fallick, Anthony, Tsortanidis, Maria, Lampridis, Andreas (2019) Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis. Minerals, 9 (1) 49 doi:10.3390/min9010049 | Journal (article/letter/editorial) | | rubies are associated with edenitic hornblende and tremolite, and rimmed by margarite, muscovite, chlorite...(mainly clinochlore and rarely nimite), margarite, tremolite and/or monazite, while for the host rocks the...and the desilicated pegmatite in marble-types of Vietnam. Colorless to blue sapphires from Naxos plumasites...partly inside the marble-hosted corundum from Vietnam, while the blue varieties plot in the extension...marble-hosted and desilicated pegmatite in marbles (Vietnam), Sahambano and Zafafotsy (Magadascar) corundum |  | | Journal (issue) | | Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam Le Thi-Thu Huong, Wolfgang Hofmeister...quartz • Indian scapolite • Spinel from northern Vietnam • Gem zektzerite • “Coral Sea” agate • Dendritic...& GEMOLOGY SPRING 2011 3 NOSY BE 4 km 0 N MINE AREA Ambato MADAGASCAR LLIN S TA C RY TA R Y...mb an ja ~1 0k m n Demantoid Antetezambato mine Figure 2. The Antetezambato garnet deposit is located...his colleagues arranged author FP’s visit to the mine and provided samples. Georges Rakotonirina (Madagascar |  | | Journal (issue) | | 187 Peñas Blancas: An historic Colombian emerald mine R. Ringsrud and E. Boehm 251 Book review 254...Colombian emerald mine Ron Ringsrud and Edward Boehm Abstract: The Peñas Blancas emerald mine is part of Colombia’s...and La Pita mines. This is the largest emerald district in Colombia, and it is the most productive and...Peñas Blancas emeralds, and compares this historic mine to other famous producers in the region. Keywords:...Blancas, located in the famous Muzo mining district. This mine has rarely been mentioned in gemmological |  | Kisin, A. Yu., Murzin, V. V., Tomilina, A. V., Pritchin, M. E. (2016) Ruby–sapphire–spinel mineralization in marble of the middle and southern Urals: Geology, mineralogy, and genesis. Geology of Ore Deposits, 58 (4) 344-359 doi:10.1134/s1075701516040036 | Journal (article/letter/editorial) | | comprehensive geological description of this rubybearing district, known as the Mogok Stone Belt, was published...Okrush et al., 1976), Nepal (Smith et al., 1997), Vietnam (Kane et al., 1991), Tajikistan (Konovalenko and...Owing to that specialization, this mineragenic province is called the Gemstone Tract of the Urals. The...(11) Mong Hsu, deposit, Myanmar; (12) Luc Yen-Yen Bai deposit, Vietnam; (13) Ruyil deposit, Nepal. I, magmatic...(chlorite of sheridanite type, Cr-tourmaline, tremolite, adularia, hydromica, cubic pyrite, sphalerite |
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