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[Carles Millan]

[Carles Millan]

Tetrahedrite, pyrite, quartz, sphalerite

A sharp and well defined tetrahedrite tetrahedron {111} sitting on top of two lustrous and finely striated cubic {100} pyrite crystals, accompanied with a lot of colorless quartz and several sphalerite crystals here and there. Both pyrite crystals show a face along an edge that probably belongs to the pyritohedron habit {210}. Overall size: 77 mm x 71 mm x 54 mm. Tetrahedrite crystal: 24 mm on edge. Major pyrite crystal: 26 mm on edge. Weight: 273 g.

Actually a member of the series tennantite-tetrahedrite. So it might be from a Sb-rich tennantite to an As-rich tetrahedrite, somewhere between.

This specimen was involved in at least five generations. It is evident that the pyrite crystals were the first to grow. Then came the sphalerite and next the tetrahedrite, since a small crystal of the latter is placed on a crystal of the former. Finally the quartz grew over all of them. But still a fifth generation had to take place because about a dozen small pyrite cubes can be seen perched on the quartz crystals.

Mundo Nuevo mining area, Mundo Nuevo, Huamachuco, Sánchez Carrión Province, La Libertad Department, Peru.

Unless otherwise noted, photos are copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

My Personal Site

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2276M-tetrahedrite1.jpg
Mineral:	Tetrahedrite, Pyrite, Quartz, Sphalerite
Locality:	Mundo Nuevo mining area, Mundo Nuevo, Huamachuco, Sánchez Carrión Province, La Libertad Department, Peru
Dimensions:	77 mm x 71 mm x 54 mm. Tetrahedrite crystal: 24 mm on edge. Major pyrite crystal: 26 mm on edge
Description:
Viewed:	40083 Time(s)

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2276M-tetrahedrite2.jpg
Mineral:	Tetrahedrite, Pyrite, Quartz, Sphalerite
Locality:	Mundo Nuevo mining area, Mundo Nuevo, Huamachuco, Sánchez Carrión Province, La Libertad Department, Peru
Dimensions:	77 mm x 71 mm x 54 mm. Tetrahedrite crystal: 24 mm on edge. Major pyrite crystal: 26 mm on edge
Description:
Viewed:	39836 Time(s)

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2276M-tetrahedrite3.jpg
Mineral:	Tetrahedrite, Pyrite, Quartz, Sphalerite
Locality:	Mundo Nuevo mining area, Mundo Nuevo, Huamachuco, Sánchez Carrión Province, La Libertad Department, Peru
Dimensions:	77 mm x 71 mm x 54 mm. Tetrahedrite crystal: 24 mm on edge. Major pyrite crystal: 26 mm on edge
Description:	Close-up view
Viewed:	39821 Time(s)

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[VRigatti]

Wonderful!

[Enrique Llorens]

Nice paragenesis.

[Carles Millan]

Ferberite, quartz

Tabular black ferberite crystals associated with each other like pages in a half open book, with several white quartz crystals at the bottom. Overall size: 63 mm x 54 mm x 28 mm. Major ferberite crystal: 41mm wide, 57mm tall. Mass: 233 g.

Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province, China.

Unless otherwise noted, photos are copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

[Tobi]

[Carles Millan]

This early morning this topic has reached the magic number of 500,000 views. I think a half million is a lot for a mere medium quality collection, so I feel a must to send a big thank you to all of you who have spent your valuable leisure time browsing my pages. And especially to Jordi Fabre for making it possible. I hope more photos will come in in the not distant future.

[Jordi Fabre]

Congratulations Carles! -> First thread of FMF to arrive to the 500.000 views!

[Tom Mazanec]

I am spending the afternoon looking at these lovely pictures while listening to Youtube play videos of my favorite Golden Oldies songs.
This thread is a treasure!

[Carles Millan]

[Carles Millan]

Axinite-(Mn), epidote

Group of sharp transparent to translucent axinite-(Mn) crystals accompanied by green epidote showing a somewhat acicular habit. Overall size: 74 mm x 66 mm x 59 mm. Major axinite crystal: 20 mm wide. Weight: 119 g. From a new find in open veins in a mountainside outcrop near the town of Canta, recovered in early September 2015. See The Mineralogical Record, 47/3, pages 347 & 348.

Canta, Canta Province, Lima Department, Peru.

Unless otherwise noted, photos are copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

My Personal Site

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8105M-axinite1.jpg
Mineral:	Axinite-(Mn), Epidote
Locality:	Canta, Canta District, Canta Province, Lima Department, Peru
Dimensions:	74mm x 66mm x 59mm. Major axinite crystal: 20 mm wide
Description:
Viewed:	39873 Time(s)

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[Carles Millan]

Azurite, dickite

Single lustrous, dark blue, mirror-faced, azurite crystal on a starkly contrasting white matrix made of soft but compact dickite. The crystal is complete all around and presumably doubly terminated, with faces and edges very well defined and free of any damage. From a find in year 2014. Overall size: 70mm x 63mm x 39mm. Azurite crystal: at least 34mm tall x 27mm wide x 10mm thick. Weight: 133g.

Milpillas Mine, Cuitaca, Mun. de Santa Cruz, Sonora, Mexico.
Probably recovered in 2014 from the Chiclet Pocket on the 890 level (Refined Elegance - The Small Treasures of Mineralogy, A Supplement to The Mineralogical Record, November-December 2022, page 73).

Another very different but also interesting azurite specimen from Milpillas can be seen by clicking here.

Unless otherwise noted, photos are copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

[Enrique Llorens]

A very fine azurite, in line with the quality of your collection.

Greetings. Enrique.

[GneissWare]

Nice job on the photos.. Really captured the blue color in one of the photos which is really hard to do without washing out the white matrix. Very nice!

[Carles Millan]