 | | Report (issue) | | To Our Readers: Pakistan is a mineralogically-rich and interesting country. The quantity of Pakistani...us by surprise when people began to ask, "Why Pakistan; why now?" It has never been our intention to...the mineral deposits of the high mountains of Pakistan and Afghanistan. Once into the project, however...justice to neither. We decided to limit our focus to Pakistan, though even focused on a single country, a comprehensive...19.6 cm high Shigar Valley, Skardu district, Northern Areas, Pakistan P hoto by Jeff Scovil Collection |  | | Journal (issue) | | the third The actual, geologically important, deposit is country and indeed the first country in Africa...have been known to produce district of the Northern Rift Valley Province, and corundum in all possible... is located in the Turkana district of the Northern Rift Valley Province on the west side of Lake Turkana...**University of Mainz, FRG 1. Introduction The emerald occurrences of Carnaiba and Socoto in the state...gemstones mined in the state of Bahia (besides emerald, others include amethyst, citrine, aquamarine, |  | | Journal (issue) | | sapphires-with three million carats produced from one deposit alone over a five-month period. It is especially...remarkably similar to rubies from the classic Mogok deposit in Burma (now Myanmar). Even Myanmar shows signs...Lien Son) Province. In a five-month period! from November 1989 through March 19901one deposit in the Luc...Luc Yen district produced more than three million carats of rough pinlz sapphire and ruby. Several other...deposits are currently being worked in this gem-rich district. According to various trade sources) the finest |  | | Journal (issue) | | garnets. Relatively minor amounts of tourmaline, emerald, aquamarine, alexandrite, amethyst, scapolite,...the type of mining associated with a particular deposit are provided below in the discussions of specific...waters (figure 4). In primary deposits lilze the emerald occur- Gem Wealth of Tanzania rence at Lalze...richest in Africa. It is unusual for a primary deposit, in that about half of the diamonds mined there...years (Wilson, 1971; Notholt, 1990). The Mwadui deposit has yielded several diamonds over 100 ct; the largest |  | | Journal (issue) | | world gem market as the Ouro Preto Imperial topaz district comprises two major active mining sites-Cap50...operation is the Cap50 mine, in the Rodrigo Silva district. Specimens and information about that mine were...occurrence) on the west, both in the Ouro Preto district (again, see figure 2). Pires et al. (1983)identified... England. Keller P C , (1983)The Capiio topaz deposit, Ouro Preto, Minas Gerais, Brazil. Gems el Gemology...or emerald) with inclusions of other minerals: calcite and dolomite for ruby, albite for emerald. In |  | | Journal (issue) | | Bernhardt, a n d Fred M o u a w a d The Yogo Sapphire Deposit Keith A. ~ ~ c h a l u k NOTES AND NEW TECHNIQUES...TECHNIQUES 42 Meerschaum from Eskisehir Province, Turkey I...occurrence of sapphircs and zircons of the Jemaa district, in central Nigeria. We coinpared the Jenlaa alkali...1992. The nzby crystrrls from the Mong Hsu marble deposit have clipymmidnl to barrel-shaped hobils and reverrl...Myanma Gems Enterprise (MGE) announced a new ruby deposit in the region of Mong Hsu, and showed the group |  | | Journal (issue) | | VII and many of his wealthy contemporaries. The emerald cut was also developed at about this time; variations...include the 90.38-ct Dcolor Briolette, the 127-ct emerald-cut Portuguese, and the 154-ct crystal known as...fine stones, usually a diamond and a fine ruby, emerald, or sapphire, set on a diagonal opposing one another...Gemstone Resources of China The Changma Diamond District, China Gemstone Carving in China: Winds ol Change...Chinese Peridot The Sapphires of Mingxi, Fujian Province, China Summer 1986 The Coscuez Mine: A Major Source |
|
