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Books Bücher 1 - 10 von 15 in facets and set in rings, they are readily mistaken, if viewed by daylight, for diamonds....
" facets and set in rings, they are readily mistaken, if viewed by daylight, for diamonds. The coarse varieties of topaz may be employed as a substitute for emery in grinding and polishing hard substances. The ancient topazion was found on an island in... "
MANUAL OF MINERALOGY (1857) - Seite 195
von JAMES D. DANA, A.M. - 1857
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A System of Mineralogy: Including an Extended Treatise on Crystallography ...

James Dwight Dana - 1837 - 571 Seiten
...Brazil. From their peculiar limpidity, they are sometimes denominated goutte d'eau, and when cut with facets and set in rings, they are readily mistaken,...grinding and polishing hard substances. The ancient roToCia» was found on an island in the Red Sea, which was often surrounded with fog, and therefore...
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A System of Mineralogy: Including an Extended Treatise on Crystallography ...

James Dwight Dana - 1837 - 571 Seiten
...Brazil. From their peculiar limpidity, tuey are sometimes denominated gnutl-e d'cau, and when cut with facets and set in rings, they are readily mistaken,...for emery in grinding and polishing hard substances. FORSTERITE. TOPAZIUS VESTJVUNUS. Lmy. Ann. Pbil. 2d series, VII. 61. 391. Primary form: a right rhombic...
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A system of mineralogy: comprising the most recent discoveries: including ...

James Dwight Dana - 1850 - 711 Seiten
...Novas in Brazil. From their peculiar limpidity, topaz pebbles are sometimes denominated gouitei (feau. The coarse varieties of topaz may be employed as a substitute for emery. PYCNITE. Monoclinic, Forchhammer; trimetric, Hausmann. Massive. Structure compact columnar. Cleavage...
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Manual of mineralogy: including observations on mines, rocks, reduction of ...

James Dwight Dana - 1851 - 432 Seiten
...Prom their peculiar limpidity, topaz pebbles are sometimes denominated gouttes d'eau. When cut with facets and set in rings, they are readily mistaken,...for emery in grinding and polishing hard substances. Topaz is cut on a leaden wheel, and is polished on a copper wheel with rotten stone. It is usually...
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A system of mineralogy: comprising the most recent discoveries: including ...

James Dwight Dana - 1854 - 533 Seiten
...Novas in Brazil. From their peculiar limpidity, topaz pebbles are sometimes denominated youttet (fctiu. The coarse varieties of topaz may be employed as a substitute for emery. The name topaz, is from roirufiot, an island in the Red Sea. STAUROTIDE, Hauy. Staurolite. Grenatite....
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A System of Mineralogy: Comprising the Most Recent Discoveries ..., Bände 1-2

James Dwight Dana - 1854 - 533 Seiten
...Novae in Brazil. From their peculiar limpidity, topaz pebbles are sometimes denominated gnuttrt tfeau. The coarse varieties of topaz may be employed as a substitute for emery. The name topaz, is from mrifioc, an island in the Red Sea. STAUROTIDE, ffauy. Staurolite. Grenatite....
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Manual of Mineralogy

James Dwight Dana - 1855 - 432 Seiten
...From their peculiar limpidity, topaz pebbles are sometimes denominated gouttes d'eau. When cut with facets and set in rings, they are readily mistaken,...for emery in grinding and polishing hard substances. Topaz is cut on a leaden wheel, and is polished on a copper wheel with rotten stone. It is usually...
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Manual of Mineralogy, Including Observations on Mines, Rocks, Reduction of ...

James Dwight Dana - 1864 - 456 Seiten
...From their peculiar limpidity, topaz pebbles are sometimes denominated goutles d'eau. When cut with facets and set in rings, they are readily mistaken,...with fog, and therefore difficult to find. It was hence named from tffpazo, to seek. This name, like most of the mineralogical terms of the ancients,...
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Manual of Mineralogy: Including Observations on Mines, Rocks, Reduction of ...

James Dwight Dana - 1866 - 454 Seiten
...From their peculiar limpidity, topaz pebbles are sometimes denominated gouttes d'eau. When cut with facets and set in rings, they are readily mistaken,...with fog, and therefore difficult to find. It was hence named from topazo, to seek. This name, like most of the, mineralogical terms of the ancients,...
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A System of Mineralogy: Descriptive Mineralogy, Comprising the Most Recent ...

James Dwight Dana - 1868 - 827 Seiten
...Novas in Brazil From their peculiar limpidity, topaz pebbles are sometimes denominated gouttes if eau. The coarse varieties of topaz may be employed as a substitute for emery. On the cryst. of topaz, see Kokscharof, Min. RussL, ii. 198, 844, iii. 195, 378 ; Hessenberg, Min....
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