 | | Journal (article/letter/editorial) | | Institution Washington, DC 20013 pohwatp@si.edu Diopside MERELANI, ARUSHA REGION, TANZANIA Most silicates... and, for pyroxenes, diopside is an exception (spodumene is another). Diopside crystals are monoclinic...point group 2/m; hence it is a clinopyroxene. Diopside crystals are commonly prismatic with a square...as simple and multiple twins on {100} or {010}. Diopside displays parting on {100} and possibly on {010}...attributed to planar exsolution lamellae (Nesse 2012)]. Diopside has a hardness of 5.5–6.5 and a specific gravity |  | | Report (issue) | | mineral col lector, was born in Kanazawa, Ishikawa Prefecture, on August 30, 1874. Soon after his graduation...a mining engineer at the Arakawa Mine, Akita Prefecture. In 1909, he was promoted to Director of the...of the Director of the Yoshioka Mine, Okayama Prefecture, for about seven years altogether. He returned...technology in the first half of this century in Japan. He retired from the Advisory Board of the Mitsu...such volumes as " Beiträge zur Mineralogie von. Japan ", Neue Folge I and II (T. Ito, 1937), " Japanese |  | | Journal (issue) | | Province). Even between neighbouring mines of the Muzo district there is no very obvious geological relationship...island arch/Japan/Philippines/New Guinea/ New Zealand Alps. 2 The mines of the Muzo district from south...Coscuez and Penas Blancas. Those of the Chivor district from S to N are: Vega de San Juan, Las Cruces...Paris (last century). The northern part of the district of Chivor is less well explored than the Gachala...the emeralds (Kozlowski, et al. (1988) The Muzo district lies directly at the Rio Itoco fault suggesting |  | | Journal (issue) | | Association of Japan Gem T n ~ s tOltachimachi 5-15-14 Ueno, Taito-ku, Tokyo 110, Japan. Our Canadian...layers in which opal has been found in the Winton district, where the Cragg mine is located. Drawing by Richard...GEMOLOGY Spring 1993 Figure 6. In the Winton district, opal is commonly found in bands between layers...and claystone, which are typical of the Winton district. Photo by Andrea Williamson. the gem (figure12)...maw-sit-sit from the Tawmaw area, in the jadeite-mining district of upper Myanmar. Pearls cultured in the Mergui |
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Kamisano, Nanbu, Minamikoma District, Yamanashi Prefecture, Japan