Deaccessions from the Philadelphia Academy of Sciences

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PAS-139 - Siderite, on Pyrite - SOLD
Llallagua, La Joya district, Cercado Province, Oruro Department, Bolivia
small cabinet, 7.0 x 5.1 x 3.5 cm

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An unusual specimen with sharp hexagonal siderite crystals perched upon pyrite. Very unusual for the locality!

PAS-149 - Triphylite - SOLD
Palermo Mines, Groton, Grafton Co., New Hampshire, USA
cabinet, 12.1 x 6.1 x 3.2 cm

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Triphylite from Palermo Mines, Groton, Grafton Co., New Hampshire, USA [db_pics/pics/pas-149a.jpg]

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Triphylite from Palermo Mines, Groton, Grafton Co., New Hampshire, USA [db_pics/pics/pas-149b.jpg]

A specimen of massive or vein-filling triphyllite, with small dark crystals of what is probably vivianite upon its surfce.

PAS-132 - Gibbsite - SOLD
Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY)
small cabinet, 8.9 x 4.8 x 3.9 cm

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From the TYPE LOCALITY where it was first noted in 1822 , this is an large and OUTSTANDING, aesthetic, drapery of the rare aluminum-containing species gibbsite upon host matrix. It was named after Colonel George Gibbs (1777-1834), original owner of the Gibbs mineral collection acquired by Yale University early in the nineteenth century (again, according to MINDAT). Gibbsite is an interesting aluminum hydroxide with very little heft to it, that otherwise tends to look like heavy smithsonite or hemimorphite at first glance. This specimen has a label IN HIS OWN HAND, from the famous collection of Charles Shephard. ex.Charles Shepherd Collection (1804-1886), whom according to the Mineralogical Record Archive on him was with Benjamin Silliman's staff at Yale in 1827, as his assistant, and later as a lecturer on natural history at Yale (1830-1847) and then Amherst College. His large collection was donated to the Smithsonian, but afew specimens apparently found their way into the Academy collection, perhaps through trades with colleagues in the Philadelphia area.

PAS-110 - Percylite - SOLD
Caracoles, Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile
small cabinet, 6.4 x 5.1 x 3.4 cm

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PAS-114 - Percylite and Schwartzembergite, and Atacamite - SOLD
Caracoles, Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile
small cabinet, 7.6 x 4.7 x 3.1 cm

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A beautiful specimen of this rare mineral combination: apparently a strange admixture of Boleite & Pseudoboleite that is probably soon to be disallowed as a species name. Still, highly unusual, and with a color all its own. To be frank, I haven't confirmed the presence of Schwartzembergite which is supposed to be a minute red stain...but I am pricing this, thus, as simply an attractive percylite and if you can find the Schwartzembergite, that is a bonus.

PAS-115a - Shortite - SOLD
Green River Formation, Sweetwater Co., Wyoming (TYPE LOCALITY)
small cabinet, 7.5 x 6.5 x 3 cm

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And you thought the Green River sandstone beds only produced fish and palm fossils, eh? Well, I did. I personally never realized that the TYPE LOCALITY for this rare sodium/calcium carbonate was in Wyoming, before now. This specimen is exceptionally rich with gemmy shortite crystals embedded in the sandstone, to 1 cm in size. This is rather large for the species , and for specimens from this locality if what i see on MINDAT is any indication. This specimen is one of two, which fit together and are thus descended from the same sample. It comes with the original label.

PAS-115b - Shortite - SOLD
Green River Formation, Sweetwater Co., Wyoming (TYPE LOCALITY)
small cabinet, 7 x 6 x 4 cm

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Shortite from Green River Formation, Sweetwater Co., Wyoming (TYPE LOCALITY) [db_pics/pics/pas-115ba.jpg]

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Shortite from Green River Formation, Sweetwater Co., Wyoming (TYPE LOCALITY) [db_pics/pics/pas-115bb.jpg]

PAS-117 - Silver with Copper - SOLD
Keweenaw Peninsula (probably Houghton County), Michigan, USA
miniature, 4.4 x 3.8 x 2.2 cm

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This is a beautiful silver specimen with accents of native copper on some of the silver , which provide s areally nice contrast. The silver and copper metals are not intermixed. Although no old label comes with the specimen, it is numbered on the bottom ANSP#23423 which indicates an age in the 1930s, probably. Several of these crrystals exceed 1 cm individually, and about an inch in aggregate. The cluster has a swaying look to it, as if it is caught in motion, "moving."

PAS-118 - Andorite on Stannite - SOLD
San Jose Mine, Oruro City, Oruro Department, Bolivia
cabinet, 11.8 x 7.2 x 3.7 cm

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SUPER-bright crystals to 7 mm of razor-sharp andorite , rare in such quality and with such lustre to them. This would be from early finds, perhaps even from the Vaux expeditions judging by the Academy accession number. There are bigger andorites, to be sure, then and now. However, as a whole, this is a really beautiful display specimen with iridescent matrix under the andorites. The matrix is stannite in tiny sharp , wildly iridescent crystals atop massive ore. I have not seen another like this!

PAS-119 - Ferro-axinite - SOLD
Vitoria da Conquista, Bahia, Northeast Region, Brazil
miniature, 5.5 x 2.4 x 0.8 cm

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Ferro-axinite from Vitoria da Conquista, Bahia, Northeast Region, Brazil [db_pics/pics/pas-119a.jpg]

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Ferro-axinite from Vitoria da Conquista, Bahia, Northeast Region, Brazil [db_pics/pics/pas-119b.jpg]

Most people today do not realize that before the finds from California and the Ural Mountains, in the last couple of decades, the world's best gem axinites came from Brazil (even if larger ones came rarely from Japan in the 1800s, they weren't gemmy). Bahia today produces many other minerals, but the axinite deposit seems to be gone. This beautiful, gemmy, transparent crystal is nearly a floater...it is doubly-terminated, but with a small contact on one tip. It has some minor edge wear, which is more obvious in the photos than in person and is not so very detracting given the size and age of the piece. According to museum records, this was in a Donahue collection.

PAS-130a - Annite - SOLD
Rockport, Cape Ann, Essex Co., Massachusetts (TYPE LOCALITY)
small cabinet, 6.8 x 5.4 x 4.6 cm

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According to MINDAT this is an extremely rare member of the Mica Group in the Biotite-Phlogopite Series. Regardless, its the most oddly crystallized mica I have seen. It looks more like a dark phosphate than a mica. From the TYPE LOCALITY where it was first noted in 1868!

PAS-122 - Atacamite - SOLD
Atacama Desert Region, Chile
cabinet, 9.8 x 9.6 x 7.2 cm

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This dramatic large display specimen features sharp, wet-looking, lustrous crystals to 6 or 7mm, draping over 2 sides of a handsized matrix of solid, massive atacamite (and presumably other coppe rminerals mixed in). The 3-dimensional quality of these crystals, their habit, is quite unlike atacmite found in this region today. To be sure it is what we thought it to be, we had this analysed for confirmation. It is atacamite, if a most unusual specimen!

PAS-123 - Aragonite with copper inclusions - SOLD
Manto Cuba Mine, Inca de Oro, Cha�aral Province, Atacama Region, Chile
cabinet, 20.2 x 9.3 x 7.9 cm

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This is a beautiful specimen, pure and simple. Regardless of anything else. The surreal blue color looks fake, painted. However, the color is actually due to copper inclusions. Note the obvious presence of a rare green mineral in small , sharp crystals: probably libethenite or brochantite. Both are found at the mine, and I have a sample sent out for analysis now.

PAS-124 - Stibarsen - SOLD
American Eagle, Luona Occurrence, Elk Mountain District, Gunnison Co., Colorado (probable)
miniature, 4.7 x 3.2 x 3.2 cm

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This is a rich specimen of stibarsen, with spheroidal nodules and massive seams in ore matrix. Since we know this is from North or South America (as the collection was divided, it was in the North & South American group...), even though the label has somehow been lost since then, we know that this is not a European specimen and so is either from Gunnison Co., Colorado or from Ophir Mine in the Comstock Lode, Nevada. However the Nevada locality has no associations of red minerals listed as occurring there, while several occur in the Colorado locale - and this piece has small red flecks of two different species present on it. So although the locality is given without a confirming label, we think it to be a correct one.

PAS-125 - Esmeraldite - SOLD
Esmeralda County, Nevada (TYPE LOCALITY)
miniature, 4.7 x 3.2 x 3.2 cm

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Rob Lavinsky, rob@irocks.com

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