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dontgogreen
Joined: 02 Aug 2015
Posts: 79
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Posted: Jun 13, 2016 09:43 Post subject: North American pyrrhotites |
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Here are some photos of a pyrrhotite and calcite from the Eagle Mine in Marquette Co, Michigan. The specimen is ~4cm tall, with a highly lustrous hoppered pyrrhotite crystal. I apologize as the photos are not the best quality and do not capture the quality of the specimen very well. Not to mention the horrific yellow lighting.
What are some other North American localities that produce well-crystallized pyrrhotite?
Mineral: | Pyrrhotite |
Locality: | Eagle Mine, Marquette County, Michigan, USA | |
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Dimensions: | 4 cm |
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Mineral: | Pyrrhotite |
Locality: | Eagle Mine, Marquette County, Michigan, USA | |
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Dimensions: | 4 cm |
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14861 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Jun 13, 2016 10:18 Post subject: Re: North American pyrrhotites |
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The yellow can be color corrected - its due to using tungsten lights with a camera white balanced for daylight.
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 828
Location: Northeast Ohio
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Posted: Jun 13, 2016 10:20 Post subject: Re: North American pyrrhotites |
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Beautiful pyrrhotites and pseudomorphs after pyrrhotite are found at Mont Saint-Hilaire - mostly micros.
_________________ Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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dontgogreen
Joined: 02 Aug 2015
Posts: 79
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Posted: Jun 13, 2016 10:32 Post subject: Re: North American pyrrhotites |
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Thanks, these corrections look much better.
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 963
Location: Tucson, Arizona
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Posted: Jun 13, 2016 10:59 Post subject: Re: North American pyrrhotites |
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Sharp lustrous pyrrhotites to 60cm were found at Santa Eulalia, Chihuahua, Mexico, both as elongate hexagonal crystals and fat hexagonal plates. The district also produced numerous pyrite pseudomorphs after pyrrhotite.
Very similar blocky crystals have also been found at La Negra, Queretaro, Mexico
San Martin-Sabinas, Zacatecas produced sharp lustrous pyrrhotite crystals to 1 cm
Mineral: | Pyrrhotite |
Locality: | Potosí Mine, level 10, Santo Domingo (Francisco Portillo), Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico | |
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Dimensions: | 8 x 12 cm |
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Fine example of stout elongate pyrrhotite from the 10th Level Main Silicate Orebody, Potosi Mine. ex Miguel Romero |
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Mineral: | Pyrrhotite |
Locality: | Potosí Mine, level 10, Santo Domingo (Francisco Portillo), Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico | |
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Dimensions: | 4 x 5 x 8 cm |
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Fine example of flat platy pyrrhotite from the 10th Level Main Silicate Orebody, Potosi Mine. Peter Megaw photo and specimen |
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_________________ Siempre Adelante! |
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alfredo
Site Admin
Joined: 30 Jan 2008
Posts: 979
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Posted: Jun 13, 2016 11:07 Post subject: Re: North American pyrrhotites |
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I found a nice TN-size pyrrhotite crystal at the Philips Pyrite Mine, Putnam Co., New York, but within a few months it first swelled up, separated into lamellae, then decomposed into sulphate slop :((
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Tony L. Potucek
Joined: 29 Dec 2006
Posts: 98
Location: Arizona
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Posted: Jun 13, 2016 22:02 Post subject: Re: North American pyrrhotites |
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The Laxey Mine (Texas Orebody) and the Sonneman Mine at South Mountain, Owyhee County, Idaho USA both produced pyrrhotite as crystals associated with quartz.
_________________ Tony L. Potucek |
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