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05. Apr. - Ta­tort Franken – Das stein­erne Grab der Rie­sen­lurche
10. Apr. - Min­er­alien­börse im Lausitz-Cen­ter in Hoy­er­sw­er­da
11. Apr. - Min­er­alien­börse im Lausitz-Cen­ter in Hoy­er­sw­er­da
11. Apr. - 23. Min­er­alien-IN­FO im Ahrn­tal - Südtirol
11. Apr. - Min­er­alien.- und Fos­silien­börse Rosen­heim - Auer Fes­thalle
12. Apr. - 31. Min­er­alien- und Fos­silien­samm­ler­börse Eg­gen­burg / AT
12. Apr. - Min­er­alien­börse Her­born-Merken­bach
17. Apr. - GERA: Bild­vor­trag „Der Ein­fluss Preußens auf den Berg­bau im
19. Apr. - 25. Bay­er­wald-Min­er­alien­börse Bad Kötzt­ing, DE
26. Apr. - 34. Min­er­alien- und Fos­silien­börse Arns­berg-Müschede, DE
09. May - 77. In­ter­na­tio­nale Min­er­alien­börse in Freiberg/Sach­sen
09. May - 50. Min­er­alien- & Fos­silien­börse “MIN­ER­AN­T2026” - Gol­d­en
09. May - 43. Aschaf­fen­burg­er Min­er­alien­börse
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Edelsteintage Konstanz
Deutschland/Nordrhein-Westfalen/Arnsberg, Bezirk/Hochsauerlandkreis/Arnsberg/Holzen
 
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05. Apr. - Ta­tort Franken – Das stein­erne Grab der Rie­sen­lurche
10. Apr. - Min­er­alien­börse im Lausitz-Cen­ter in Hoy­er­sw­er­da
11. Apr. - Min­er­alien­börse im Lausitz-Cen­ter in Hoy­er­sw­er­da
11. Apr. - 23. Min­er­alien-IN­FO im Ahrn­tal - Südtirol
11. Apr. - Min­er­alien.- und Fos­silien­börse Rosen­heim - Auer Fes­thalle
12. Apr. - 31. Min­er­alien- und Fos­silien­samm­ler­börse Eg­gen­burg / AT
12. Apr. - Min­er­alien­börse Her­born-Merken­bach
17. Apr. - GERA: Bild­vor­trag „Der Ein­fluss Preußens auf den Berg­bau im
19. Apr. - 25. Bay­er­wald-Min­er­alien­börse Bad Kötzt­ing, DE
26. Apr. - 34. Min­er­alien- und Fos­silien­börse Arns­berg-Müschede, DE
09. May - 77. In­ter­na­tio­nale Min­er­alien­börse in Freiberg/Sach­sen
09. May - 50. Min­er­alien- & Fos­silien­börse “MIN­ER­AN­T2026” - Gol­d­en
09. May - 43. Aschaf­fen­burg­er Min­er­alien­börse
Calender
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Edelsteintage Konstanz
 
 
 
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 10531 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.
 
Edelsteintage Konstanz
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Ore leach­ing (in ger­man)The metal extraction by ore leaching (mostly copper) was about 1,000 years BC. known in the Mediterranean, but there are also barely no written records. The in the Middle Ages and in the following Renaissance well-known different procedures were first described in detail by Georg Agricola 1556 in his book "De Re Metallica Libri XII". A contribution by Peter Seroka
The me­t­al ex­trac­tion by ore leach­ing (most­ly cop­per) was about 1,000 years BC. known in the Mediter­ranean, but there are al­so bare­ly no writ­ten re­cords. The in the Mid­dle Ages and in the fol­low­ing Re­nais­sance well-known dif­fer­ent pro­ce­dures were first de­scribed in de­tail by Ge­org Agri­co­la 1556 in hi ... moreThe metal extraction by ore leaching (mostly copper) was about 1,000 years BC. known in the Mediterranean, but there are also barely no written records. The in the Middle Ages and in the following Renaissance well-known different procedures were first described in detail by Georg Agricola 1556 in his book "De Re Metallica Libri XII". A contribution by Peter Seroka
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St. An­dreas­berg im HarzDas 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:
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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The Mu­nich Show 2025The 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.
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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In­di­ca­tor stoneA Scandinavian indicator stone is a glacial erratic composed of a characteristic rock type derived from a small known source area in Scandinavia. This term not only applies to igneous and metamorphic rocks but also to some sedimentary rocks. The Jotnian Sandstone and most of the Palaeozoic limestones, and the Old Red Sandstone are not included in the definition, although the presence of these and other rocks provide some evidence about the source area(s) of erratics and should certainly not be neglected in a stone count. In all cases we recommend including the whole assemblage of erratics/stones in such account. This makes it possible to use several methods of Interpretation. However, it should be pointed out that the practise used in the past, whereby each researcher had her/his own method of interpreting stone counts, has proved to be unsatisfactory. We demonstrate on the bases of over 2000 counts of indicator stones that we have carried out on assemblages mostly from Lower Saxony and Schleswig-Holstein, but also from other N.German states and neighbouring countries, that the TGZ method (LÜTTIG 1958) yields the most reliable results. In addition to this method, the sources of individual indicator stones may be plotted on a so-called circle map and can be integrated with possible source data and the relative frequencies of other erratics in the assemblage. Some rock types are more suitable as indicator stones then others. It is unwise to use clearly unsuitable rock types; this would considerably reduce the reliability of the method and lead to erroneous results.
A Scan­di­na­vian in­di­ca­tor stone is a gla­cial er­rat­ic com­posed of a char­ac­teris­tic rock type de­rived from a small known source area in Scan­di­navia. This term not on­ly ap­plies to ig­neous and me­ta­mor­ph­ic rocks but al­so to some sed­i­men­tary rocks. The Jot­nian Sand­s­tone and most of the Palaeo­zoic lime­s­tone ... moreA Scandinavian indicator stone is a glacial erratic composed of a characteristic rock type derived from a small known source area in Scandinavia. This term not only applies to igneous and metamorphic rocks but also to some sedimentary rocks. The Jotnian Sandstone and most of the Palaeozoic limestones, and the Old Red Sandstone are not included in the definition, although the presence of these and other rocks provide some evidence about the source area(s) of erratics and should certainly not be neglected in a stone count. In all cases we recommend including the whole assemblage of erratics/stones in such account. This makes it possible to use several methods of Interpretation. However, it should be pointed out that the practise used in the past, whereby each researcher had her/his own method of interpreting stone counts, has proved to be unsatisfactory. We demonstrate on the bases of over 2000 counts of indicator stones that we have carried out on assemblages mostly from Lower Saxony and Schleswig-Holstein, but also from other N.German states and neighbouring countries, that the TGZ method (LÜTTIG 1958) yields the most reliable results. In addition to this method, the sources of individual indicator stones may be plotted on a so-called circle map and can be integrated with possible source data and the relative frequencies of other erratics in the assemblage. Some rock types are more suitable as indicator stones then others. It is unwise to use clearly unsuitable rock types; this would considerably reduce the reliability of the method and lead to erroneous results.
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TwinsThe study of twins starts due to the very first beginnings of crystallography as a science. Not negligible for this reason, the idea or the concept of a twin crystal are often associated with a macroscopic building. Modern studies at the nano scale have shown that the formation of twins can occur at a very early stage of crystal growing. Based on these findings, it does beg the request to reconsider the formation mechanisms, and adjacency to the newly different categories. (Text in german)
The study of twins starts due to the very first be­gin­n­ings of crys­tal­log­ra­phy as a sci­ence. Not neg­li­gi­ble for this rea­son, the idea or the con­cept of a twin crys­tal are of­ten as­so­ci­at­ed with a macro­s­cop­ic build­ing. Mod­ern studies at the nano scale have shown that the for­ma­tion of twins can oc­cur at ... moreThe study of twins starts due to the very first beginnings of crystallography as a science. Not negligible for this reason, the idea or the concept of a twin crystal are often associated with a macroscopic building. Modern studies at the nano scale have shown that the formation of twins can occur at a very early stage of crystal growing. Based on these findings, it does beg the request to reconsider the formation mechanisms, and adjacency to the newly different categories. (Text in german)
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Public Sci­ence Pro­jects / Sk­lo­dowskite and Bolt­woodite from Lavri­on – an In­ter­est­ing Epi­taxyAt the site Paliokamariza Mine No. 18 (Plaka, Lavrion, Attica, Greece), yellow, needle-like uranium minerals were observed growing on gypsum. Under UV light (365 nm), two distinct fluorescence colors appeared: shorter, thinner needles glowed bright green, while longer, well-formed needles glowed yellow...

This study illustrates a notable epitaxial relationship between Boltwoodite (green luminescent) and Sklodowskite (yellow luminescent) on a gypsum matrix, discovered at Lavrion, Greece. Luminescent differentiation under UV, combined with spectroscopic and EDX analyses, revealed the intergrowth of the two uranium silicates—providing insight into their growth and crystallization behavior
At the site Palioka­mariza Mine No. 18 (Pla­ka, Lavri­on, At­ti­ca, Greece), yel­low, nee­dle-like ura­ni­um min­er­als were ob­served grow­ing on gyp­sum. Un­der UV light (365 nm), two dist­inct flu­o­res­cence col­ors ap­peared: short­er, thin­n­er nee­dles glowed bright green, while longer, well-formed nee­dles glowed yel ... moreAt the site Paliokamariza Mine No. 18 (Plaka, Lavrion, Attica, Greece), yellow, needle-like uranium minerals were observed growing on gypsum. Under UV light (365 nm), two distinct fluorescence colors appeared: shorter, thinner needles glowed bright green, while longer, well-formed needles glowed yellow...

This study illustrates a notable epitaxial relationship between Boltwoodite (green luminescent) and Sklodowskite (yellow luminescent) on a gypsum matrix, discovered at Lavrion, Greece. Luminescent differentiation under UV, combined with spectroscopic and EDX analyses, revealed the intergrowth of the two uranium silicates—providing insight into their growth and crystallization behavior
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Perl­proben... Man glüht in der rauschenden Flamme eines Bunsenbrenners ein Magnesiastäbchen bis zur Rotglut aus. Mit dem heißen Magnesiastäbchen wird eine kleine Menge Borax oder Phosphorsalz aufgenommen und vorsichtig in die Brennerflamme gebracht. Unter ständigen Drehen wird das Salz so lange in der Brennerflamme gedreht, bis eine klare Perle entstanden ist. Dieser Vorgang wird so lange wiederholt, bis eine Perle von ca. 4 -5 mm entstanden ist ... ein Beitrag von Andreas B.
... Man glüht in der rauschen­den Flamme eines Bunsen­bren­n­ers ein Mag­ne­si­astäbchen bis zur Rot­g­lut aus. Mit dem heißen Mag­ne­si­astäbchen wird eine kleine Menge Bo­rax oder Phos­phor­salz aufgenom­men und vor­sichtig in die Bren­n­er­flamme ge­bracht. Un­ter ständi­gen Dre­hen wird das Salz so lange in der Bren­n­er ... more... Man glüht in der rauschenden Flamme eines Bunsenbrenners ein Magnesiastäbchen bis zur Rotglut aus. Mit dem heißen Magnesiastäbchen wird eine kleine Menge Borax oder Phosphorsalz aufgenommen und vorsichtig in die Brennerflamme gebracht. Unter ständigen Drehen wird das Salz so lange in der Brennerflamme gedreht, bis eine klare Perle entstanden ist. Dieser Vorgang wird so lange wiederholt, bis eine Perle von ca. 4 -5 mm entstanden ist ... ein Beitrag von Andreas B.
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https://crystalparadise.de/