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.
 
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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Mineralien Kalender
 
... Skarn ist ein al­ter sch­wedisch­er Berg­baube­griff, welch­er ur­sprünglich be­nutzt wurde, um jede Art si­likatisch­er Ganggesteine oder tau­ber Gesteine zu beschreiben, welche mit eisen­halti­gen sul­fidischen Lager­stät­ten as­soziiert waren, welche stel­len­weise paläo­pro­tero­zoische Kalk­steine im sch­wedischen ... more... Skarn ist ein alter schwedischer Bergbaubegriff, welcher ursprünglich benutzt wurde, um jede Art silikatischer Ganggesteine oder tauber Gesteine zu beschreiben, welche mit eisenhaltigen sulfidischen Lagerstätten assoziiert waren, welche stellenweise paläoproterozoische Kalksteine im schwedischen Bergbaurevier Peterberg ersetzten. Im modernen Sprachgebrauch bedeutet Skarn Calcium-haltige Silikate jeglichen Alters. Skarne oder "Erlane" sind Gesteine, die bei der Metasomatose aus Kalk- oder Dolomitgesteinen durch Reaktion der Carbonatmineralien mit SiO2 bzw. am magmatischen Intrusivkontakt entstehen. Sie werden auch manchmal als Kalksilikatgesteine bezeichnet, was jedoch nicht korrekt ist, da Kalksilikatgesteine metamorph und nicht metasomatisch gebildet ... Ein Beitrag von Peter Seroka
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Im Stein­bruch ste­hen Rif­fkalke an, die stel­len­weise dolomi­tisiert sind. Aber es fin­d­en sich Bereiche in de­nen mergelige und bi­tu­minöse Schie­fer an­ste­hen, die auf geringe Wasser­be­we­gung hin­weisen. Bei ange­wit­tertem Gestein lassen sich als Riff­bild­n­er Ko­rallen und Stro­ma­to­poren erken­nen. Die Kalke bei ... moreIm Steinbruch stehen Riffkalke an, die stellenweise dolomitisiert sind. Aber es finden sich Bereiche in denen mergelige und bituminöse Schiefer anstehen, die auf geringe Wasserbewegung hinweisen. Bei angewittertem Gestein lassen sich als Riffbildner Korallen und Stromatoporen erkennen. Die Kalke beinhalten eine reichhaltige Meeresfauna, die typisch für den obergivetischen Massenkalk ist, und durch Uncites gryphus und Stringocephalus burtini als Leitfossilien geprägt sind. Diese ist auch als Stringocephalus-Fauna bekannt. Neben den bereits genannten und anderen Brachiopoden finden sich dort auch eine Vielzahl von Korallen ... Ein Beitrag von Karl S. und Wilhelm W.
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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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This is the most com­pre­hen­sive syn­op­sis re­lat­ed to the his­to­ry, the min­er­al­o­gy, the ex­ploi­ta­tion and the most ac­tu­al eco­nom­ic and po­lit­i­cal re­sumé on rare earth el­e­ments and their min­er­als to be found in the in­ter­net. REE be­long to the most im­por­tant raw ma­te­rials of the 21st cen­tu­ry, which are used ... moreThis is the most comprehensive synopsis related to the history, the mineralogy, the exploitation and the most actual economic and political resumé on rare earth elements and their minerals to be found in the internet. REE belong to the most important raw materials of the 21st century, which are used in a large number of key technologies. However, due to the fact that almost 97% of the world's REE are mined and produced in China, REE have become an ongoing political issue, mainly amongst technology providing countries like the US, Japan and Western Europe.

This portrait tries to explain the characteristics of REE and their role for our modern world. Written and investigated by Peter Seroka. (Article in german)
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Min­er­al por­trait gar­netThis portrait mainly deals with the 6 classic garnets, their amazing history, the world’s best known classic and modern localities and deposits and their use as a gems or abrasives. It also deals with the common belief related to the non-existence of blue garnets and its refutation proven by new finds. A separate chapter deals with synthetic garnets. But it also deals with the mix up of definitions, groupings and old and unnecessary terms, which have finally been terminated or brought to a common denominator.

In 2012 the IMA (CNMNC) has defined garnets as members of the Garnet Supergroup, which include all minerals isostructural with garnet regardless of what elements occupy the four atomic sites; i.e. the supergroup includes several chemical classes . Those minerals are closely related to each other and may form a series with each other. Some garnets form intermediary minerals between each member, and may even be intergrown within a single crystal.

With the publication of the new nomenclature of the garnet supergroup, the term “garnet group” does not have its meaning anymore and the intermediate working term “Garnet superstructural group” has been replaced by “Garnet Supergroup”.
There are 32 approved species and 5 “candidate” species waiting on approval. The 32 species are subdivided by their Z-charge into 29 species, which belong to 5 groups and to 3 single representative species.
One of those 5 groups is the “Garnet group”, consisting of the 6 former (classic) garnets Pyrope, Grossular, Spessartine, Almandine, Uvarovite and Andradite plus 8 rarer garnets , as Menzerite-(Y), Eringaite, Goldmanite, Momoiite, Knorringite, Calderite, Majorite and Morimotoite.
This por­trait main­ly deals with the 6 clas­sic gar­nets, their amaz­ing his­to­ry, the world’s best known clas­sic and mod­ern lo­cal­i­ties and de­posits and their use as a gems or abra­sives. It al­so deals with the com­mon be­lief re­lat­ed to the non-ex­is­tence of blue gar­nets and its refu­ta­tion proven by new ... moreThis portrait mainly deals with the 6 classic garnets, their amazing history, the world’s best known classic and modern localities and deposits and their use as a gems or abrasives. It also deals with the common belief related to the non-existence of blue garnets and its refutation proven by new finds. A separate chapter deals with synthetic garnets. But it also deals with the mix up of definitions, groupings and old and unnecessary terms, which have finally been terminated or brought to a common denominator.

In 2012 the IMA (CNMNC) has defined garnets as members of the Garnet Supergroup, which include all minerals isostructural with garnet regardless of what elements occupy the four atomic sites; i.e. the supergroup includes several chemical classes . Those minerals are closely related to each other and may form a series with each other. Some garnets form intermediary minerals between each member, and may even be intergrown within a single crystal.

With the publication of the new nomenclature of the garnet supergroup, the term “garnet group” does not have its meaning anymore and the intermediate working term “Garnet superstructural group” has been replaced by “Garnet Supergroup”.
There are 32 approved species and 5 “candidate” species waiting on approval. The 32 species are subdivided by their Z-charge into 29 species, which belong to 5 groups and to 3 single representative species.
One of those 5 groups is the “Garnet group”, consisting of the 6 former (classic) garnets Pyrope, Grossular, Spessartine, Almandine, Uvarovite and Andradite plus 8 rarer garnets , as Menzerite-(Y), Eringaite, Goldmanite, Momoiite, Knorringite, Calderite, Majorite and Morimotoite.
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