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 10457 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.
 
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The Min­er­alien­t­age München 2025 – The Mu­nich Show once again show­cased a fas­ci­nat­ing va­ri­e­ty of min­er­als, fos­sils, and jew­el­ry. Al­though vis­i­tor num­bers ap­peared slight­ly low­er than last year, the fair re­mained vi­brant and di­verse. High­lights in­clud­ed the col­lec­tor dis­plays and the spe­cial ex­hi­bi­tio ... moreThe Mineralientage München 2025 – The Munich Show once again showcased a fascinating variety of minerals, fossils, and jewelry. Although visitor numbers appeared slightly lower than last year, the fair remained vibrant and diverse. Highlights included the collector displays and the special exhibition on natural resources, while the fossil section was somewhat smaller.
Some visitors expressed a wish for more seating areas, opportunities for exchange, and more eye-catching advertising, yet overall the event left a very positive impression and remains a must-visit for collectors and families alike.
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Ara­g­onite is a cal­ci­um car­bo­nate, chem­i­cal­ly iden­ti­cal with calcite. The min­er­al calcite, how­ev­er, dif­fers from Ara­g­onite due to its in­ter­nal crys­tal struc­ture. While the crys­tal sys­tem of calcite is trig­o­n­al, the sys­tem of ara­g­onite is rhom­bic. Dense mass­es of small ara­g­onite crys­tals are dif­fi­cul ... moreAragonite is a calcium carbonate, chemically identical with calcite. The mineral calcite, however, differs from Aragonite due to its internal crystal structure. While the crystal system of calcite is trigonal, the system of aragonite is rhombic. Dense masses of small aragonite crystals are difficult to distinguish from calcite, but they are larger, they show a distinct habit.

A lot of chapters in this portrait will give you much more details about this interesting mineral. Written and investigated by Peter Seroka. (Article in german)
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Calcite is one of the most abun­dant na­t­u­ral min­er­als. It is found in very dif­fer­ent shapes, both com­pact as lime­s­tone as well as sin­ter in caves and in the crys­tal­line state. But even in our dai­ly life calcite is al­ways pre­sent: in some re­gions it block­es wa­ter pipes as "chalk", we build our hous­es ... moreCalcite is one of the most abundant natural minerals. It is found in very different shapes, both compact as limestone as well as sinter in caves and in the crystalline state. But even in our daily life calcite is always present: in some regions it blockes water pipes as "chalk", we build our houses with it, it is in our food chain and without it we could not stand upright.

Calcite is not rare, but the varied mineral on Earth. The variety of forms and variations of the forms of calcite are unmatched in the world of mineralogy. By 2009, more than 800 Calcit forms have been described.
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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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Wer Cölestin zuerst ent­deckte und wo­her das Ty­plokal­itäts­ma­te­rial herkam, ist nicht ganz klar. Of­fiziell wurde das Min­er­al 1781 vom französichen Ge­olo­gen Dolomieu auf Sizilien ent­deckt, an­dere Quellen sprechen von ein­er Er­stbeschrei­bung im Jahr 1791, wobei das Orig­i­nal­ma­te­rial faseriger blauer Cöles ... moreWer Cölestin zuerst entdeckte und woher das Typlokalitätsmaterial herkam, ist nicht ganz klar. Offiziell wurde das Mineral 1781 vom französichen Geologen Dolomieu auf Sizilien entdeckt, andere Quellen sprechen von einer Erstbeschreibung im Jahr 1791, wobei das Originalmaterial faseriger blauer Cölestin von Belliwood, Blair County, Pennsylvania gewesen sein soll.

Das Mineral wurde bereits Ende des 19. Jahrhunderts in England und Deutschland bergmännisch abgebaut, wobei der Hauptverwendungszweck die Restentzuckerung von Melasse und die Herstellung von Feuerwerk war. Zwischen 1880 und 1920 deckten die Gruben in der Avon Gorge bei Bristol in SW-England 90% des Welt-Cölestinbedarfs. Aus drei Lagerstätten bei Yate, nördlich von Bristol, wurde Cölestin bis Mitte der 1930er Jahre gefördert.
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Das so­ge­nan­nte Sil­ber­erzre­vi­er von St. An­dreas­berg ist eine sch­male, nach West­en keil­för­mig aus­laufende Fläche. Diese ist unge­fähr 6 km lang und 1 km bre­it. Sie liegt dicht am südlichen Rand des Brock­en­granites.

Es wur­den in die­sem Re­vi­er et­wa 18 erzführende Gänge und 6 bis 8 taube "Ruscheln" im ... moreDas sogenannte Silbererzrevier von St. Andreasberg ist eine schmale, nach Westen keilförmig auslaufende Fläche. Diese ist ungefähr 6 km lang und 1 km breit. Sie liegt dicht am südlichen Rand des Brockengranites.

Es wurden in diesem Revier etwa 18 erzführende Gänge und 6 bis 8 taube "Ruscheln" im Laufe der Betriebszeit erschlossen und mehr oder weniger intensiv abgebaut. Auserhalb dieses "Silberdreieckes" sind noch andere Erzgänge bekannt, die jedoch eine andere Mineralführung aufweisen: Eisenspat, Schwerspat und nur geringe Mengen von Pb-, Zn- und Cu-Sulfiden.

Die Streichrichtung der Erzgänge verläuft zwischen 130° und 150° (quer zu den Faltenachsen), die der Ruscheln von 70° bis 80° sowie von 100° bis 110°. Diese Ruscheln sind ... Ein Beitrag von:
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