chrysoberyl


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Words related to chrysoberyl

a rare hard yellow green mineral consisting of beryllium aluminate in crystal form

References in periodicals archive ?
You'll be understanding if, when you obtain a copy of the book, you turn to the Santa Tereza chrysoberyl (page 106: Keith Proctor collection), Morro Velho gold (page 150: Alvaro Lucio collection), Lavra Caba Saco rutile (page 288: Luiz Menezes collection), Brumado dolomite (page 317: Julio Landmann collection), Ouro Preto crocoite (page 331: Alvaro Lucio collection), Sapo mine fluorapatite (page 347: Jim and Gail Spann collection), Malacacheta autunite (page 357: Luiz Menezes collection), or nearly any one of the stunning specimens of topaz, elbaite, beryl, euclase, etc.
Cat's-eye chrysoberyl and sillimanite (fibrolite) are particularly prized for their sharp 'eyes', especially when such cabochons also show high transparency.
de), which was holding court at the Pueblo/River-park Inn show, had excellent thumbnail-size V-twins and sixling twins of alexandrite chrysoberyl from Lake Manyara, Arusha, Tanzania.
A remarkable number of other species have also been identified as inclusions in Zambian emeralds, including actinolite, tremolite, chlorite, dravite, apatite-(CaF), magnetite, hematite, quartz, fluorite, magnesite, siderite, dolomite, calcite, ankerite, niobium-rich rutile, pyrite, talc, zircon, barite, albite, lepidocrocite, glauconite, quartz, chrysoberyl, margarite, muscovite, biotite, brookite, tourmaline and chrysotile (Huong, 2008; Zwaan et al.
The yellow-green, partially gemmy single crystals of chrysoberyl reach only a few millimeters, but they perch smartly on faces of tapered ('Tessin"-habit) smoky quartz crystals.
The next shelf down in the showcase was filled with bright, gemmy, yellow to yellow-green groups of chrysoberyl crystals from a pocket opened in April 2008 in a pegmatite at Ambatondrazaka: the thumbnail and miniature-size specimens are groups of twinned chrysoberyl crystals with individuals to about 3.
Beekman (1992) divides the subject matter covered in the third book as follows: seven chapters on metals, including gold, silver and iron; 13 chapters on minerals, including realgar, orpiment, alum, pyrite, marcasite, gypsum, quartz, alabaster and asbestos; seven chapters on gemstones, including diamonds, rubies, emeralds, sapphires, chrysoberyl, opal and agates; a remarkable 29 chapers on the unremarkable subject of concretions; and a miscellany of chapters on "curiosities," including stones with unusual shapes, porcelain, salt, amber, glass, etc.
Rhodesian alexandrite sixling chrysoberyl twins an inch across would come a little more expensive--maybe as much as $2.
corundum, beryl, chrysoberyl, tourmaline, garnets, quartz, opal, jade, "The Natural Glasses" and marble.
He initiated, or was active in, various specimen mining projects in Vera Cruz, Guerrero, and Sonora, Mexico; the Otjua mine in Namibia; chrysoberyl, topaz and brazilianite localities in Brazil; the De Maria gold mine in California; the Blanchard mine in New Mexico; the Bunker Hill mine in Idaho; the Block D mine area in Arusha, Tanzania; and a new epidote locality in Kenya which he worked with the legendary African explorer Campbell Bridges.
Further, Herr Hintze had a few nice, loose, thumbnail-size specimens of chrysoberyl (variety alexandrite) from Lake Manyara, Tanzania: flattened, contact-twinned, gray-green crystals, not gemmy but sharp and lustrous, some with an easily visible color-change (i.
New Era Gems of Grass Valley, California had a fine array of loose alexandrite chrysoberyl crystals from Lake Manyara in Tanzania.