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Mineral Specimens with Gibbsite
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page 4 / 4 - prev - 56 specimens selected
9.8 x 7.5 x 6.3. cm. Lustrous and translucent, green botryoidal aggregates of gibbsite, to .7 cm across, are situated under some snow white gibbsite, to .7 cm across, in and on a limonite vug. A very 3-dimensional piece with unusual color gradation to a pastel powder-blue in some places.
8.8 x 5.5 x 4.8 cm. A thin crust of lustrous and translucent, green, gibbsite, in botryoidal aggregates to .7 cm across, emplaced on matrix.
9.1 x 3.3 x 2.2 cm. Two mounds of translucent, green gibbsite with botryoidal aggregates, to .7 cm across, sit on a thin crust of matrix.
8.8 x 4.8 x 2.9 cm. Pastel, greenish-blue botryoids of gibbsite, to .3 cm across, are nestled in a vug. A very 3-dimensional piece with unusual color gradation to a pastel powder-blue in some places. Tim Blackwood Collection.
8.8 x 7.4 x 2.1 cm. Lustrous and translucent, grayish-green, botryoidal aggregates of gibbsite to .5 cm across, totally cover their matrix. There are also some veins of a white phase of gibbsite for unusual accent.
6.9 x 5.9 x 2.6 cm. A thin box-work of matrix is host to a crust of unusually waxy & lustrous, translucent, green gibbsite, to .5 cm across.
6.8 x 6.2 x 5.3 cm. Several vugs in this specimen are hosts to lustrous and translucent botryoidal aggregates of green gibbsite to 1.5 cm across. The shape and look of the botryoidal aggregates are reminiscent of Arkansas wavellite. This is a very rich, fine specimen with unusually large botryoidal crystallization - rarely seen in the find.
A STRIKING and beautiful plate covered with orange crocoite, brown gibbsite and cream-colored dundasite from Dundas, Tasmania, Australia. The brown gibbsite is a tentative identification. This is an UNCOMMONLY FINE combination specimen from this locality, especially the dundasite. 7.8 x 4.5 x 1.4 cm
ex. Martin Zinn
This was a onetime find about 6 years ago, where one room at Tucson had some flats of this rare material that was at first (and still often is...) mistaken for hemimorphite but is instead this rare aluminum hydroxide species. You can tell actually, just by the heft which is exceedingly lightweight! But nobody suspected any such mineral and so there they were, sold as hemimorphite in the beginning. Now, they are impossible to get - I have seen only one other for sale in the last few years. I regard these Chinese specimens as best-of-species, at least in terms of beauty and color.
ex. Philadelphia Academy of Natural Sciences
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.
ex. Philadelphia Academy of Natural Sciences
TYPE LOCALITY - 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 is a large, showy specimen of gibbsite from the TYPE LOCALITY. According to MINDAT, this mineral was: named after Colonel George Gibbs (1777-1834), original owner of the Gibbs mineral collection acquired by Yale University early in the nineteenth century.
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Rob Lavinsky, rob@irocks.com
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share specimen![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270401a.jpg]](db_pics/mdpics/MD-270401a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270402a.jpg]](db_pics/mdpics/MD-270402a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270403a.jpg]](db_pics/mdpics/MD-270403a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270404a.jpg]](db_pics/mdpics/MD-270404a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270405a.jpg]](db_pics/mdpics/MD-270405a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270406a.jpg]](db_pics/mdpics/MD-270406a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270408a.jpg]](db_pics/mdpics/MD-270408a.jpg)
![Gibbsite from Xianghualing Mine (Hsianghualing Mine), Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-270408b.jpg]](db_pics/mdpics/MD-270408b.jpg)
![Crocoite, Gibbsite, Dundasite from Dundas mineral field, Zeehan district, Tasmania, Australia [db_pics/mdpics/MD-60826a.jpg]](db_pics/mdpics/MD-60826a.jpg)
![Gibbsite from Baoshan, Yunnan Province, China [db_pics/pics/mrz295a.jpg]](db_pics/pics/mrz295a.jpg)
![Gibbsite from Baoshan, Yunnan Province, China [db_pics/pics/mrz295b.jpg]](db_pics/pics/mrz295b.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-132a.jpg]](db_pics/pics/pas-132a.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-132b.jpg]](db_pics/pics/pas-132b.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-132c.jpg]](db_pics/pics/pas-132c.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-132d.jpg]](db_pics/pics/pas-132d.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-38a.jpg]](db_pics/pics/pas-38a.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-38b.jpg]](db_pics/pics/pas-38b.jpg)
![Gibbsite from Richmond, Berkshire Co., Massachusetts (TYPE LOCALITY) [db_pics/pics/pas-38c.jpg]](db_pics/pics/pas-38c.jpg)