Mineralienatlas (name for mineral atlas) is the platform for people interested in mineralogy, geology, palaeontology and mining since 2001. We operate a significant database for minerals, fossils, rocks and their localities. Mineralienatlas is not limited to a section. We bring together information and inform comprehensive.

To complete our information constantly, we need your support. With us, everyone can and should participate. Currently Mineralienatlas is used and expanded by 10586 members. Every month hundreds of thousands of visitors use our website as an information source.
 
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Geolitho Foundation non-profit GmbH is the non-profit supporter of the Mineral Atlas (Mineralienatlas), the Lithotheque, the Geolitho Collection Management and the Marketplace and Store by collectors for collectors. The Foundation promotes public education in the field of mineralogy, geology, paleontology and mining by operating, maintaining and further expanding earth science projects.
 
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Olivine is not a se­parate min­er­al, but a mem­ber be­long­ing to the fors­terite-fay­alite mix­ing se­ries. Olivine be­longs to the olivin-groupe whose end-mem­bers are cal­cio-olivine and tephroite. Fors­terite is a mag­ne­si­um sil­i­cate; fay­alite an iron sil­i­cate. If com­mon­ly is spo­ken of olivine, it is usu­al­ly ... moreOlivine is not a separate mineral, but a member belonging to the forsterite-fayalite mixing series. Olivine belongs to the olivin-groupe whose end-members are calcio-olivine and tephroite. Forsterite is a magnesium silicate; fayalite an iron silicate. If commonly is spoken of olivine, it is usually a more or less iron-rich forsterite. The color of olivine is generally yellowish green, olive green to black. You will find much more interesting details in our portrait about this common mineral series.

Written and investigated by Peter Seroka. (Article in german)
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Ear­ly be­fore Py­ro­mor­phite got its name, Py­ro­mor­phite was known as Grün-, Braun-, Bunt­bleierz or Po­lychrom. Best spec­i­men are known from Freiberg, Clausthal, Dorn­bach and Pri­bram adorned the former Min­er­als cabi­nets of Jo­hann Richter, Karl Pabst von Ohain, Chris­tian Lud­wig Stieglitz, Car­o­line Louise ... moreEarly before Pyromorphite got its name, Pyromorphite was known as Grün-, Braun-, Buntbleierz or Polychrom. Best specimen are known from Freiberg, Clausthal, Dornbach and Pribram adorned the former Minerals cabinets of Johann Richter, Karl Pabst von Ohain, Christian Ludwig Stieglitz, Caroline Louise of Baden, Johann Wolfgang von Goethe, Abraham Gottlob Werner, Ignaz von Born, Sigmund Zois and other prominent collectors of the 18th to early 19th century. The first chemical analysis undertook M. H. Klaproth in 1784; the name Pyromorphit, from the Greek "pyro" for fire and "Morpho" for form, was of J.F.L. Hausmann 1813 awarded. The reason for this peculiar ... An article by Peter Seroka in german language
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„Den heuti­gen Be­fun­den nach bildete da­mals ein einziger steil ein­fal­l­en­der „Erz­fal­l“ die Quelle für den kurzzeiti­gen märchen­haften Reich­tum. Dem Ausstrich des Ganges fol­gen über Tage einige 4–8 m tiefe Pin­gen, die ver­broch­ene Schürf­schächtchen darstellen und bis auf die Soh­le des St. Ge­org Stol­lens ... more„Den heutigen Befunden nach bildete damals ein einziger steil einfallender „Erzfall“ die Quelle für den kurzzeitigen märchenhaften Reichtum. Dem Ausstrich des Ganges folgen über Tage einige 4–8 m tiefe Pingen, die verbrochene Schürfschächtchen darstellen und bis auf die Sohle des St. Georg Stollens reichten. Das erst in diesem Niveau aufsetzende eigentliche Erzmittel wies eine streichende Erstreckung von kaum mehr als 50 m auf und reichte bis zur Sohle des St. Jacobsglücker Stollens hinab. Sowohl nach Nordwesten als auch nach Südosten ließen sich nirgendwo Fortsetzungen der Vererzung lokalisieren. Weitere edle Erze fanden sich auf verschiedenen flachen Nebentrümern im Hangenden des Hauptganges, oberhalb des St. Johannes Stollen im Bereich des sogenannten Backofens
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Sil­ver and sil­ver min­er­als are amongst the most de­sir­abe ob­jects since the be­gin­n­ing of min­er­al col­lect­ing. Sil­ver wires and curls from Kongs­berg and Freiberg are the coro­na­tion of each min­er­al col­lec­tion. Beau­ti­ful pyrar­gyrites and proustites en­hance each col­lec­tor's heat­beat.

How­ev­er, sil­ver is ... moreSilver and silver minerals are amongst the most desirabe objects since the beginning of mineral collecting. Silver wires and curls from Kongsberg and Freiberg are the coronation of each mineral collection. Beautiful pyrargyrites and proustites enhance each collector's heatbeat.

However, silver is not only the essence of high-end collecting but has contributed essentially to the history of mankind. Uncountable remain the millions of greek and phenician slaves, middle age european miners and millions of indios who have left their lives for silver.

Silver is one of the seven metals known since thousands of years, already been mentioned in the bible. Mountains of slag in Asia Minor, Arabia and on the agaen islands prove technologies to produce silver from lead ore; knowledges people had been acquainted with since at least 4.000 year B.C. Since the antiquity silver had been used to make finery and ornaments, however, most of this metal was used to stamp coins. The monetary system of many countries was based on silver; the one, who owned silver, was able to finance wars. One of the main pillars of power of Athens, Rome, the Phenicians, the church, the kings and queens of Castilia, the Austrian house of Habsburg and, last not least, of the Americans had been their control over the richest silver mines and the wars, which they made by paying their soldiery with silver coins.
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The Pet­ri­fied For­est is pri­mar­i­ly a ge­o­log­i­cal park, which owes its ori­gin to the cli­mate and ge­o­log­i­cal events. It is part of the so-called Paint­ed Desert and shows with its vari­ous lay­ers a strange and im­pres­sive scen­ery. Char­ac­ter­ized by ero­sion, it is a trea­sure trove of fos­sils. The rock for­ma ... moreThe Petrified Forest is primarily a geological park, which owes its origin to the climate and geological events. It is part of the so-called Painted Desert and shows with its various layers a strange and impressive scenery. Characterized by erosion, it is a treasure trove of fossils. The rock formations show a chronicle of the past and give clues about the events of bygone days. In the park you can exposure rock strata until 234 million years ago. The colorful desert hills, the flat mesas and shaped hills attributable primarily to Chinle Formation and are fluvial sediments, caused by water movement. Countless fossilized wood and tree trunks bear witness to a scrumptious earlier fauna.
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One of Mada­gas­car's ge­o­log­i­cal spe­cial­ties are the so-called Ts­in­gy: bizarre, at first sight hos­tile Karst land­s­capes, though form, due to the in­ac­ces­si­bil­i­ty, a refu­gial area for some spe­cies. The word Ts­in­gy means "walk­ing one tip-toes" or "where one can­not walk bare-foot" in Mala­gasy lan­guage, an ... moreOne of Madagascar's geological specialties are the so-called Tsingy: bizarre, at first sight hostile Karst landscapes, though form, due to the inaccessibility, a refugial area for some species. The word Tsingy means "walking one tip-toes" or "where one cannot walk bare-foot" in Malagasy language, an accurate description for the partially razor-sharp rock formations which can reach 20 m in height and with ends which can be as thin as pencils.

Best known and most impressive are the Tsingy of Bemaraha in the West of the island and the Tsingy of Ankarana in the North, both widespread Karst areas. In the North, as well, about 10 km south of the city of Antsiranana, one can find the Red Tsingy which have been washed out of the lateritic layer of earth.
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