| | Journal (article/letter/editorial) | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal | | | Book | Montana Hodges Robert Feldman Shaded relief indicates terrain and slope. Second Edition Rockhounding...longitude numbers and grid ticks are GPS compatible. Montana Enhanced detail shows more symbols, labels, and...history Cover photos of Montana agate (front) and ammonite imprint (back) © Montana Hodges Cover design by...imprint of The Globe Pequot Press MONTANA Search for stunning Montana agate along the Yellowstone River...paleontologists excavate dinosaurs in Malta. Rockhounding Montana points the way to the best rockhounding in the | | | Book (volume) | brownish yellow octagonal calcite (21.30 ct), Montana; light yellow orthoclase feldspar (25.03 ct), Idaho;...Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal step cut violetish pink...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...oligoclase feldspar (5.04 ct), Oregon; and three Montana sapphires, violetish blue (2.52 ct), yellow (4...large-scale mining of sapphire-bearing gravels in Montana is beginning and is expected to produce large quantities | | | Book | ROADSIDE % JEOLOGY of Montana David Alt and Donald W. Hyndman ROADSIDE N JEOLoGY of Montana David Alt Donald...Roadside geology of Montana. Bibliography: p. Includes index. 1. Geology — Montana — Guide-books. I. Hyndman...know something about the rocks and landscapes of Montana. We hope our professional colleagues will enjoy...dealing with the four major geologic provinces in Montana. Each starts with its own more specific narrative...Nearly every geologist who has ever worked in Montana contributed something to this book. We read almost | | | Book (volume) | Vivid blue matched benitoite gems from Sai, Benito County, California, consisting of 52 benitoites and 75...oligoclase feldspar (5.04 et), Oregon; and three Montana sapphires, violetish blue (2 .52 et), yellow (4...large-scale mining of sapphire-bearing gravels in Montana is beginning and is expected to produce large quantities...improved clarity and color. Beautiful, intense red beryl c1ystals, many of facet-grade, found in the Wah...crushed and treated to release the crystals. Red beryl gems, rese1nbling the finest red spinels in color | | | Report (issue) | the Basin and Boulder Mining Districts, Boulder River Watershed, Jefferson County, Montana Professional...the Basin and Boulder Mining Districts, Boulder River Watershed, Jefferson County, Montana Edited by David...historical mining in the Boulder River watershed, Jefferson County, Montana............................Geological Survey The Boulder River watershed study, Jefferson County, Montana ........................Fey, and Tracy C. Sole D9. Hydrogeology of the Boulder River watershed study area and examination of the | | | Journal (issue) | G.A. I INTRODUCTION The most significant gem-beryl producing area in Rhodesia is the Miami pegmatite...in the younger pegmatites in this area include beryl, mica, tantalite and cassiterite; the quartz veins...suitable for the growth and development of gem quality beryl, tourmaline and topaz (Stagman, 1978, p.56). These...formation of euclase, which replaces earlier-formed beryl crystals. The rarer beryllium minerals are more...to a late stage low-temperature replacement of beryl. This is thought to be the case for the Rhodesian | | | Journal (issue) | sapphire doublets, the comparison with heating beryl to produce aquamarine is indeed inappropriate. Only...detail hereafter. Worth mentioning is a colourless beryl (a so-called goshenite) from Brazil, which had been...to be exposed at the surface of the colourless beryl, thus allowing a microprobe examination to be carried...presence of Al (twice as much as in the embracing beryl!), Si, and K. Consequently the parcels and individual...crystals—forming a most unusual internal paragenesis of beryl. 50 x 553 J.Gemm., 1981, XVII, 8 in intimate |
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Homestake Pass, Boulder Batholith, Jefferson County, Montana, USA