| The term used in the plural "pyrites" has often been misused in the past or in common for marcasite, chalcopyrite, pyrrhotite and other yellow to brass-colored minerals. The word pyrite is derived from the Greek "pyrites lithos" (derived pyr = fire and lithos = stone) and describes a characteristic ... moreThe term used in the plural "pyrites" has often been misused in the past or in common for marcasite, chalcopyrite, pyrrhotite and other yellow to brass-colored minerals. The word pyrite is derived from the Greek "pyrites lithos" (derived pyr = fire and lithos = stone) and describes a characteristic of the mineral, when rubbing against steel or flint (flint) to generate sparks. In prehistoric tombs pyrite concretions and unrolled pyrite where found, which supposed to be used for lighting a fire. (Article in German) |
| Inclusions are inside the crystal enclosed foreign materials like liquids, gases, hydrocarbons (oil, asphalt), sediment, NaCl, as well as other minerals or crystals. Inclusions can be a sort of fingerprint of the place of dicovery. Thus inclusions show us under which geologic conditions minerals had ... moreInclusions are inside the crystal enclosed foreign materials like liquids, gases, hydrocarbons (oil, asphalt), sediment, NaCl, as well as other minerals or crystals. Inclusions can be a sort of fingerprint of the place of dicovery. Thus inclusions show us under which geologic conditions minerals had formed. This allows conclusions on the place of discovery. The article deals with the different kinds of inclusions, her conditions of build, which minerals do often have inclusions and how they appear. (Full text in german) |
| Who knows Tucson with its many satellite events, has already a good taste of the Sainte-Marie-aux-Mines show. Unlike in Munich where you find the stands clear and concentrated in halls, the organizers use single fenced-off parts of the city to place the stands on the streets. Public buildings such ... moreWho knows Tucson with its many satellite events, has already a good taste of the Sainte-Marie-aux-Mines show. Unlike in Munich where you find the stands clear and concentrated in halls, the organizers use single fenced-off parts of the city to place the stands on the streets. Public buildings such as swimming pool, school and theater are transformed into smaller exhibition halls... A small showreport by Stefan Schorn (in german) |