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Natural Science Forum / Earth Science / Mineralogy / August 2004Unknown minerals
Hello, does anyone know something about this minerals? 1. Mineral (600gramm) http://www.zs-compuservice.de/min/100_0265.JPG 2. Mineral (1600gramm) http://www.zs-compuservice.de/min/100_0268.JPG 3. Mineral (400gramm) http://www.zs-compuservice.de/min/100_0276.JPG There scientific names, would be nice. Thanks, Sebastian Sebastian, Telling a mineral from photographic observation alone is a hazardous business - but here are best educated guesses: 0265 looks like metallic silicon - but that does not occur naturally, so my second guess (if it is narural) would be graphite - you might want to look up the other properties of graphite to see if they check out. 0268 looks like some sort of carbonate - probably calcite, but the photo isn't very useful - so you need to do some other tests (e.g. calcite would fizz with dilute HCl) 0276 looks very much like quartz - but check the hardness and the density. cheers Bill > Hello, > [quoted text clipped - 12 lines] > > Sebastian I agree with Bill that 265 looks like elemental silicon. Could also be molybdenite, or a broken single crystal of pyrite. Specular hematite and sperrylite (wouldn't that be nice?) are also candidates depends on the size of your specimen. 268 has fractures that appear to be cleavage planes that intersect in a triangular fashion. Could be fluorite. 276 does have one crystal with a hexagonal section, again, agree with Bill, Quartz.Will E. > Sebastian, > Telling a mineral from photographic observation alone is a hazardous [quoted text clipped - 25 lines] > > > > Sebastian Even the most kindly-disposed "Fachman" wouldn't dare saying anything. J.J. > Even the most kindly-disposed "Fachman" wouldn't dare saying anything. > J.J. Please explain "Fachman". cheers Bill Fachmann oder Fachfrau (auch Spezialist oder Experte) ist eine Person, die ueber umfangreiches Wissen auf einem oder mehreren bestimmten Fachgebieten oder ueber spezielle Faehigkeiten verfuegt. Auch ein Wissensvorsprung gegenueber dem Durchschnitt kann einen Fachmann definieren. Neben dem reinen Wissen ist auch eine kompetente Anwendung desselben kennzeichnend. Solche Fertigkeiten gruenden sich meist auf Training sowie Talent. Das Expertenwissen eignet sich die Person in der Regel durch eine Ausbildung oder ein Studium an, es kann jedoch auch durch Forschung oder autodidaktisch erworben werden. ...or in plain English, an expert which has acquired his/her expertise by study, research or self-culture. I tought that the use of the German word was quite appropriate in this case, the more that the translations found in bilingual dictionaries were very wanting. J.J. > > Even the most kindly-disposed "Fachman" wouldn't dare saying anything. > > J.J. > Please explain "Fachman". > cheers > Bill > Fachmann oder Fachfrau (auch Spezialist oder Experte) ist eine Person, die > ueber umfangreiches Wissen auf einem oder mehreren bestimmten Fachgebieten [quoted text clipped - 13 lines] > case, the more that the translations found in bilingual dictionaries were > very wanting. Well, one learns something new every day! Thanks. cheers Bill |
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