 | 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) | | for gems mined from the modern-day Tajikistan (spinel), and “Bohemian ruby” was used for gems coming... with a hardness of 9 on the Mohs scale (while spinel and garnets crystallize in the cubic system and...and are softer with a hardness of 8). Unlike spinel and garnet, ruby is a dichroic mineral, which will...Vatomandry; (2) Andriba; (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3) Zazafotsy;...Zazafotsy; Ankaratra (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3)IlakakaZazafotsy; |  | | Book | | Inclusions in Marble-Hosted Gem-Quality Ruby and SpinelfromMogok,Myanmar Reprinted from: Minerals 2020...the Australasian region. He works closely with his counterparts from the SE Asia region. He leads industry-CODES-funded...ensemble in which ruby and sapphire associate with spinel and sapphirine in a highly calcic anorthosite-layered...new detailed U–Pb dating on gem-quality ruby (and spinel) by using zircon and zirconolite inclusions in...zirconolite grains were analyzed from ruby and spinel crystals. Analyses were made of core and rim zones |  | | Journal (issue) | | You, Donors FEATURE ARTICLE 80 Gem Wealth of Tanzania Dona M. Dirlam, Elise B. Misiorowski, Rosemary...ABOUT THE COVER: Over the last three decades, Tanzania-the subject of the lead article in this issue-has...of gem-quaLity diamonds, rubies, and sapphires, Tanzania is perhaps best known for its production of the...nation of Tanzania has great gem wealth. First known by Westerners for its diamonds, Tanzania emerged in...De Beers has reinstated diamond exploration in Tanzania, n e w gem materials such as transparent green |  | | Journal (issue) | | John I. Koiv~il~i New Rubies from the Morogoro Area, Tanzania H. A. HLinni and I<. Schmetzer NOTES AND...years, rubies have emerged from new deposits in Tanzania and Vietnam that closely resemble Burmese stones...material that has recently emerged from the Morogoro area of Tanzania. The loose rubies and fancy sapphires...economic outlook of countries such as Vietnam and Tanzania, promises both new markets and new gem materials...the historic deposits in the Bohemian Hills. In Tanzania, we have seen mining expanded, leading to the |  | | Journal (issue) | | 322 Rubies and Sapphires from Winza, Central Tanzania Dietmar Schwarz, Vincent Pardieu, John M. Saul...“D-TO-Z” DIAMONDS diamonds from the Cape of Good Hope region, and “Jager” for colorless diamonds with strong...the blue region of the spectrum, as it is the absorption area of wavelengths in this region that allows...the 6-watt lamps used in the past. Here, the UV region shows good agreement between the three lamps. Note...that results in an additional emission in the red region between 620 and 700 nm that does not have a noticeable |  | | Journal (issue) | | Mobile fluorite inclusion in quartz • Inclusions in spinel from Madagascar • Sphalerite in topaz • Tourmaline...in Mexico • Colored gemstone mining update from Tanzania • Purple pyrope-almandine garnet from Mozambique...corundum-bearing rocks at Sutara, in the Jewish Autonomous Region of the Russian Far East. The authors postulate...741.2 nm and related absorption in the visible region; the latter imparts a green to blue color. An interesting...with absorption, which extends into the visible region and becomes less intense at shorter wavelengths |
|
