 | | Journal (issue) | | ......................................... 24 Guatemala ................................................emeralds with many large crystals, from the Panshir Valley, medium to low quality ruby and pink sapphires...production of tourmaline, aquamarine and kunzite (Kunar Valley) in the states of Nuristan and Laghman. Prospects...recovered manually from bedrock in the Okanogan Valley of southern British Columbia. The new opal is not...from this location is expected to remain limited. Garnet Bowenite D eposits of bowenite, well known to |  | | Book (volume) | | amethyst (left, upper group) which measures about 25 mm (1 in.) across. TOP GROUP. Green fluorite (121... Maine; round brilliant red-orange spessartine garnet (16.62 ct), Ramona, California; deep red cushion...gold. The necklace is 45 cm (18 in.) long. BOTTOM GROUP. Deep, spinel red oligoclase feldspar (5.04 ct)...C. & Barbara T. Smith, Four Clover Mine, Castro Valley, CA; Lita R. Smith-Gharet, Steel Eagle, Tigard...Alvin A. Youngquist, Bergsten Jade Co., Castro Valley, CA; June Culp Zeitner, Rapid City, SD. [also wish |  | | Book (volume) | | Company of El Paso, Texas. Information on the Virgin Valley opal deposits was given by G. Keith Hodson of Scottsdale...account of the agates found in the Mississippi Valley was provided by Irving W. Hurlbut of Muscatine... Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene, Tourmaline, Sodalite and Cancrinite...Jadeite), Rhodonite, Idocrase (Vesuvianite), The Garnet Group. Quartz FAMILY GEMSTONES RarRE AND UnusuaL...Drawing of Ramona Topaz crystal . View of Virgin Valley . An opal digging XI List of Illustrations | | | Book (volume) | | amethyst (left, upper group) which measures about 25 mm (I in.) across. TOP GROUP. Green fluorite (121... Maine; round brilliant red-orange spessartine garnet ( 16.62 et), Ramona, California; deep red cushion...gold. The necklace is 45 cm (18 in.) long. BOTTOM GROUP. Deep, spine! red oligoclase feldspar (5.04 et)...C. & Barbara T. Smith, Four Clover Mine, Castro Valley, CA; Lita R. Smitl1-Gharet, Steel Eagle, Tigard...Alvin A. Youngquist, Bergsten Jade Co., Castro Valley, CA; June Culp Zeitner, Rapid City, SD. I also |  | | Book | | (Fe,Mg,Zn)3-4 LOCALITIES AND ASSOCIATIONS GROUP INTRODUCTIONS Shows important rock or mineral localities...introductory page describing the parameters of the group, as well as any further sub-groups. is often associated...lazuli. Lazurite is a member of the feldspathoid group. It is always deep or vibrant blue, and it was once...representative specimens show the diversity within the group. SECTION SHOWN bladed crystals rich blue colour...Some silicate minerals also inlude an additional group classification. CRYSTAL SYSTEM: the crystal system |  | | Book | | Colombia for emeralds and Kashmir (Sumjam, Kundi Valley) for blue sapphires were found relatively recently...carving dates at least back 7000 BCE in the Hindus valley (Rapp 2002a). 8 2 Gems Through the Ages Fig...replaced by a simple unornamented dome). Amethyst and garnet became particular favourites and were often used...related to ruby (also attributed to spinel and red garnet) and in Pliny all red stones were called carbunculus...Europe and in Mesoamerica (southern Mexico through Guatemala to Honduras and Nicaragua) objects were found |  | | Book (edition) | | Chrysoberyl Spinel Topaz Tourmaline The Garnets Feldspar Group Zircon Peridot 69 92 117 150 167 171 175 185 195...book would be more sensibly shared out among a group of authors/gemmologists, each member tackling his...Edition being extracted from ‘Gems of the Silica Group’ to form a separate chapter. I have also reintroduced...some reason, the stones are better placed in a group forming a small subchapter. In the technical section...rocks. Figure 1.3 Basaltic lava flow of 1944 in a valley leading down to Naples, Italy. The Monte Somma |
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