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Suche Informationen zu Granat aus Mexiko

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Hg:
Hallo,
ich habe eine recht schöne Granat-Stufe aus Mexiko bekommen. Auf dem Stück befinden sich mehrere himbeerrote Kristalle.
Als Fundort wurde "Sierra de las Cruces, Coahuila, Mexiko" angegeben.
Hat irgendjemand nähere Informationen zu diesem Fundort bzw zu diesen Granat-Stufen?
Gruß,
Andreas

uwe:
Bist Du sicher, daß es sich um Granat handelt ? Sieht mir eher wie Roselith aus (falls die Farbe dem Orginal entspricht.)

Uwe

Collector:
Hallo Andreas
diese rosaroten bis violettroten Grossulare sind seit ca. 1970 auf dem Markt, also schon fast Klassiker. Die Kristalle werden bis 15 cm groß und sind nicht selten mit Vesuvianit vergesellschaftet.
Der genaue Fundort ist eine Skarn- und metamorphisierte Kontaktzone in der Sierra de la Cruz im Municipio de Sierra Mojada in Coahuila, ca. 6 km östlich vom Lago Jaco (Jaco-See).
Neben den roten kommen auch weiße und grüne Grossulare vor.

Der Fundort wurde oft fälschlich mit Lake Jaco in Chihuahua angegeben.

Gruß
Peter Seroka

Hg:
Hallo Peter,
danke für die schnelle Hilfe!
Mindat hat die Fundstelle als INCORRECT LOCALITY  so gut wie gestrichen. Sehr interessant finde ich die Geschichte zu dieser Fundstelle, die ich hier einmal zitieren möchte:

--- Zitat ---Back in the 1950s a well known mineral dealer in Monrovia, California, George Burnham traveled to Mapimi, Mexico to collect minerals at that famous mine. The mine was owned by the big Mexican mining company of Peñoles. They had stopped working the mine and had made a deal with a collective of local miners and they were continuing to work the mine as best they could. George cut a deal with this "Colectivo". He had cut a deal with the local mining collective to get permission to collect minerals in the mine. While he was there, his camp site was visited by a representative of Peñoles and who asked him what he was doing there. Hostility was in the air till he explained that he had worked out a deal with the collectivo and was there to collect mineral specimens and answered all questions asked by the representative who also knew something about minerals and then they became friendly and spent several hours talking about minerals. The man asked George if he had ever seen any pink garnets and George said no he had not and the man told him about another Peñoles where he could get some. George arranged at a later date to visit the mine and take a look at the pink garnets. Some months later when he got to the mine on a subsequent trip to Mexico, he found the mine office indeed had some very interesting pink garnets, but they were not from the mine, but rather from the hacienda belonging to a relative of one of the mines employees. They made immediate arrangements to visit the hacienda. At the hacienda was in Coahuila state near the Sierra de las Cruz. They made arrangements to borrow horsed and pack animals and went up into the mountains and found abundant specimens of pink and other colored garnets. While they were collecting there was some discussion about what locality they should give the garnets because since these pink garnets had never been seen before and they would be hot items, if they gave the exact locality many other people would descend on the spot and dilute the value of their find. Also the man who owned the hacienda was not keen on having a lot of people bothering him about garnets. From the top of the mountain George could look west into Chihuahua state to a big dry lake or at least dry some of the time. This was Lake Jaco. George labeled his specimens Lake Jaco, Mexico. This is where the locality name came from and it is still to be seen on the labels for many Mexican Garnet crystals, and it is an incorrect locality for the reasons stated above.
[Rock Currier 2010]
--- Ende Zitat ---

@Uwe: Ja, das ist Granat und die Farbe stimmt auch  ;)  Ich war auch recht verblüfft, als ich die Stücke sah.

Gruß,
Andreas

Embarak:
Hallo,
Im Handel sind sie sogar in größerer Zahl vor Jahren als Himbeergranat bzw. Raspberry Garnet aufgetaucht
und wurden als Mn-Grossulare zugeordnet.
Meine Stufe hat die FO-Angabe,wie von Peter beschrieben. (@Andreas,sehr schöne Stufe   ;D )
Hier auch : Himbeergranat z.B.
http://www.mineralium.com/index.php?cat=GRA-001&lang=DEU&product=GRA-033
Gruß
Norbert

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