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 10530 members. Every month hundreds of thousands of visitors use our website as an information source.
 
Geolitho Foundation non-profit GmbH
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.
 
https://www.mineral-bosse.de
https://www.chiemgauer-mineralien-fossiliensammler.de/
https://www.edelsteine-neuburg.de
Edelsteintage Konstanz
https://fossilsworldwide.de/
https://www.juwelo.de
 
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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The min­er­al fair end­ed suc­cess­ful­ly and the au­thor of this ar­ti­cle re­ceived on­ly pos­i­tive feed­back. Many deal­ers were ex­treme­ly sat­is­fied. Ac­cord­ing to the or­ganiz­er, 18,000 guests visit­ed the halls on Sa­t­ur­day alone. Both days were a hive of ac­tiv­i­ty and the nu­mer­ous chil­dren's at­trac­tions were wel ... moreThe mineral fair ended successfully and the author of this article received only positive feedback. Many dealers were extremely satisfied. According to the organizer, 18,000 guests visited the halls on Saturday alone. Both days were a hive of activity and the numerous children's attractions were well received. Parents were everywhere with their children to complete the geo-rally.

For mineral collectors, the usual dealers were on site, although some tables remained empty. There were no highlights from the scene or overflowing tables with identical material from new finds. However, one stand with an impressive selection of Germanite chunks was a welcome novelty.

The special exhibition “The Impossible Crystal” was a success. Even if not all the exhibits could be described as “impossible crystal”, all the pieces were of the best quality and well worth seeing. In the B halls, the author visited the “Young Designers”, including a student who presented cast silver jewelry in an organic design that showed off the embedded stones to their best advantage - an impressive piece of work...

Translated with DeepL.com (free version)
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The Al­ten­berg tin mine is well known for its huge sur­face break left by the min­ing ac­tiv­i­ties. Among min­er­al col­lec­tors the mine is fa­mous as well for its unique Py­c­nite de­posit, a va­ri­e­ty of to­paz oc­cur­ring in mas­sive colum­nar ag­gre­gates up to a length of 30 cm.

The min­ing start­ed in 1440 and c ... moreThe Altenberg tin mine is well known for its huge surface break left by the mining activities. Among mineral collectors the mine is famous as well for its unique Pycnite deposit, a variety of topaz occurring in massive columnar aggregates up to a length of 30 cm.

The mining started in 1440 and continued, with several ups and downs and some total shut-down periods, until 1991. The mining activities aimed for a plutonic granite body (350 to 400 metre in diameter and hydrothermally mineralized mainly with cassiterite and smaller amounts of wolframite, molybdenite, arsenopyrite, bismuth and others) and managed to extract a total sum of 37 million tons of ore. The huge surface break, called "The Altenberger Pinge", is the result of several roof collapses caused by excessive ore excavation and later on the continued drawing of caved material from the bottom of the fracture zone.

Collectible minerals were rare and small, so the Altenberg tin mine became never as famous as the Freiberg or Ehrenfriedersdorf districts, but its unique geology and mining technology made it quite interesting and worth a closer look.

(Full text in german)
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Diese Lokal­ität ist nach Rüders­dorf wohl der ergie­big­ste Fun­dort in Bran­den­burg. Wobei die An­zahl der Min­er­alarten die von Rüders­dorf so­gar noch über­stei­gen dürfte. Im Ge­gen­satz zu Rüders­dorf kann man hi­er auch noch frei sam­meln und Funde sind im Prinzip garan­tiert. Die Ton­gruben lie­gen in der Nähe ... moreDiese Lokalität ist nach Rüdersdorf wohl der ergiebigste Fundort in Brandenburg. Wobei die Anzahl der Mineralarten die von Rüdersdorf sogar noch übersteigen dürfte. Im Gegensatz zu Rüdersdorf kann man hier auch noch frei sammeln und Funde sind im Prinzip garantiert. Die Tongruben liegen in der Nähe der Bundesstraße 167 westlich von Bad Freienwalde und sind von Berlin aus einfach zu erreichen. Wie schon anklingt, gibt es zwei Tongruben. Die Nordgrube baut noch und wird immer größer. Sie ist, wenn man aus dem Oderbruch kommt, schon von weitem als heller Fleck in den dunklen bewaldeten Hügelketten um Bad Freienwalde zu erkennen. Die zweite Grube liegt wenig entfernt im Hammerthal. Man fahre die Straße "Im Hammerthal" von der B167 ab und bis zum Ende durch. Man gelangt zu einem kleinen Parkplatz und wandere an der Jugendherberge vorbei in den Wald. Linkerhand läuft ein Zaun entlang, an dessen Ende man sich durch sumpfiges Gelände über einen kleinen Bach hinweg kämpfen muss. Nach einiger Zeit taucht die große Wand der alten Südgrube auf. Bei feuchter Witterung ist absolute Vorsicht geboten. Der Verfasser hat selbst schon mehrmals fast das Schuhwerk eingebüßt, der zähe Ton ist nicht zu unterschätzen.
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Sand­calcite sind Calcite, die während ihr­er Bil­dung größere Men­gen von Sand, zuweilen bis weit über 50%, "poikili­tisch" im Kris­tall eingeschlossen haben. Sand­calcite sind somit eine Variante des Calc­its. Sie zeich­nen sich ge­genüber an­deren Min­er­alien da­durch aus, dass der eingeschlossene Sand das Kr ... moreSandcalcite sind Calcite, die während ihrer Bildung größere Mengen von Sand, zuweilen bis weit über 50%, "poikilitisch" im Kristall eingeschlossen haben. Sandcalcite sind somit eine Variante des Calcits. Sie zeichnen sich gegenüber anderen Mineralien dadurch aus, dass der eingeschlossene Sand das Kristallwachstum nicht wesentlich behindert. Neben Calcit sind sandhaltige Kristalle auch von den Mineralen Baryt (z.B. aus Rockenberg in Hessen), Gips (Wüsten-, bzw. Sandrosen) und Steinsalz bekannt. Sandcalcite sind unter den Calciten eine Seltenheit, auch wenn sie sich nicht gerade durch eine große Attraktivität auszeichnen. Fälschlicherweise werden sie oft als Pseudomorphosen bezeichnet, durch einen einfachen Test mit verdünnter Salzsäure (HCl) kann jedoch schnell das Gegenteil bewiesen werden. Zu den Sandcalciten zählt man auch auf Calcit
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https://crystalparadise.de/
https://vfmg.de/der-aufschluss/
https://www.lithomania.de
hausen - Mineraliengrosshandel.com
https://www.mineralbox.biz
Mineralien Kalender