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Goethite pseudo. after Selenite, with Calcite from Santa Eulalia District, Chihuahua, Mexico [http://img.irocks.com/new2011/Goethite-ps-Selenite-SantaEulalia-Mexico-73mm-JB403-12.jpg]
Santa Eulalia District, Chihuahua, Mexico
Small Cabinet, 7.3 x 6.0 x 3.1 cm
This piece formed from geothite casting over and partially replacing selenite crystals in parallel cluster, which then dissolved (they are water soluble, after all). So, it is hollow and light in weight, though it looks massive somehow, to the eye . We have all seen a lot of this material creep to market over the years, though I suspect much of it actually was a lot older, found in the 1970s and prior. But THIS piece has always stood out to me for many reasons: its sheer sharpness, intense jet black (not gray or brownish) color saturation, wet-looking lustre to the geothite, and that wonderful association with sparkling, colorless calcite atop! I obtained this in an old collection in 2003, and sold it into the Dave Stoudt Mexico collection shortly after. It remains my personal favorite amongst all such examples of this particular material I have handled. Joe Budd photos
Adamite var. Manganoan on Goethite from Ojuela Mine, Mapimi, Durango, Mexico [http://img.irocks.com/new2012/HECK207d.jpg]
Ojuela Mine, Mapimi, Durango, Mexico
Cabinet, 13.4 x 9.5 x 4.7 cm
A botryoidal crust of brownish-black goethite is host to a large, aesthetic cluster of lustrous and translucent, bi-colored mangan adamite crystals, to aVERY LARGE SIZE of 3.5 cm in length. The lower 80% of the crystals are ivory-colored while the gemmier terminations exhibit a lovely, light lavender color. This is one of the largest clusters of manganoan adamite I have seen from the incredible finds at Mina Ojuela in 1981-2. Although the color is not intense, it is present, and in this case it is present as an accent to the overall form and richness of the piece, lending purple highlights to unsuual white crystals. The crystals are sinuous and interesting, in and of their own. The contrast of the curving crystals which are sharply pointed on either end, with the rolling black hills of geothite matrix, really adds a lot to the specimen
Manganite on Goethite from Caland pit, Atikokan, Hutchinson Township, Ontario, Canada [http://img.irocks.com/new2010/LTH38A.JPG]
Caland pit, Atikokan, Hutchinson Township, Ontario, Canada
Miniature, 3.5 x 3 x 2 cm
A MAJOR locality Manganite that has unusually blocky crystals for the locale, up to 1.7 cm, with razor-sharp edges and excellent luster. The striations, slight overlap, and the way that these sit on the Goethite matrix make this exceptionally aesthetic as a whole, for a black mineral. Certainly one of the best Manganites I have seen from this well-known location, it has been in Marty's private collection for over a decade since a big find here in the 1990s
Adamite in Limonite pocket from Ojuela Mine, Mapimi, Durango, Mexico [http://img.irocks.com/new2012/Adamite-Limonite-OjuelaMine-Mexico-6cm-JB613-04.jpg]
Ojuela Mine, Mapimi, Durango, Mexico
Small Cabinet, 6.0 x 5.6 x 5.0 cm
xxxxxxxxx. Ex Dalton and Consie Prince collection. Sold by their daughter in a private auction to collector Dave Stoudt, bidding against major private collector buyers and a dealership in 2005. Joe Budd Photos.