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Rocks and Minerals. Rock, Mineral and Crystal Specimens. 
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Mixed Minerals
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Edward David
Illinois Fluorites
Brochantite Crystals on Quartz Matrix
Bou Azzer District, Tazenakht, Ouarzazate Province, Draa-Tafilalet Region, Morocco, Africa  
9 x 5.3 x 3 cm
Ex-Betty Kalaskie Collection
Dazzling specimen of Brochantite acicular crystal clusters on contrasting white matrix. The color is a lustrous emerald-green which pops against the stark white background. Even better in person and in pristine condition.
A wonderful specimen of vibrant blue Smithsonite with white patterning. The botryoidal surfaces are highly lustrous and in pristine condition.
Blue Smithsonite
Choix, Mun. de Choix, Sonaloa, Mexico
6.8 x 6 x 4.5 cm
Fluorite Crystal Cluster
Yiwu County, Zhejiang Province, China
12.7 x 11 x 3.1 cm
A large and quite colorful specimen of nicely translucent octahedral green Fluorite crystals with some second-generation accents of grayish cubic Fluorite crystals in some areas. In excellent condition.
Witherite Crystal Cluster
Mahoning #4 Mine, Hardin County, Illinois, USA
4.5 x 4 x 3 cm
Ex-Gregory Crenko Collection
Rare, twinned crystals of Witherite on matrix. Witherite was named for William Withering (1741-1799) an English physician and naturalist who in 1784 published his research on the new mineral. In fine condition.
Prehnite with Calcite
Prospect Park, Passaic County, New Jersey, USA
9.5 x 5 x 3 cm
Ex-M.C. Brown collection

Botryoidal Fluorite Crystal Cluster on Matrix
Yiwu, Jinhua, Zhejiang, China
8 x 5.5 x 2.5 cm
Botryoidal MalachiteCrystal Cluster
L'Etoile du Congo Mine, Lubumbashi, Haut-Katanga, Dem. Republic of the Congo, Africa
7.5 x 3 x 1 cm
Ex-M.C. Brpwn Collection
Mimetite Crystals on Matrix
San Pedro Mine,  Corralitos, Casas Grandes Municipality, Chihuahua, Mexico
6 x 4.5 x 2.5 cm
Ex-M.C. Brown Collection
Fluorite Crystals on Sphalerite
Gordonsville Mine, Elmwood, Smith County, Tennessee, USA
10 x 8 x 4.5 cm
Bi-Colored Quartz Crystal Cluster
White Haven, Luzerne County, Pennslyvania, USA
16 x 9 x 4.5 cm
Ex-K.C.Dalby Collection
El Refugio Mine, Choix, Sinaloa, Mexico
9.5 x 9 x 5 cm
Ex-C. Oldham Collection
Fluorite Crystals on Calcite
Emilio Mine, Lorone, Asturias, Spain
11 x 10 x 4 cm
Pyromorphite Crystals on Matrix
Resuperferolitica Claim, Cerro de la Canaleja, Santa Eufemia, Comarca Los Pedroches, Cordoba, Andulusia, Spain
7 x 4.5 x 3.7 cm
Ex-Andres Jimenez Shelly Collection
 Beautiful Pyromorphite crystals with an elongated habit and hopper-shaped terminations forming parallel growths, many of which are doubly terminated. With good luster and greener tones than most specimens from this locality - an old mining district exploited as far back as Roman times. In fine condition.
Siderite Crystals with Pyrite
Bodovalle Mine, Gallarta, Abanto y Ciervana/Abanto Zierbena, Comarca Gran Bilbao, Vizcaya/Bizkaia, Basque Country, Spain
8.4 x 6.1 x 2.2 cm
Ex-Andres Jimenez Shelly Collection
An aesthetic coverage of lenticular Siderite crystals with a light brown color, good luster, and with coatings of Pyrite microcrystals. In fine condition.
Malachite Stalactite
Mashamba West mine, Dem. Republic of Congo, Africa
18 x 6 x 4 cm
Calcite Crystals on Matrix
Xianghualing Mine, Linwu County, Chanzhou Prefecture, Hunan Province, China
10.2 x 6.8 x 4.3 cm
Ex-Brian Kosnar Collection
Chalcopyrite Crystal Cluster on Quartz
9th September Mine, Madan Ore Field, Rhodope Mountains, Smolyan Oblast, Bulgaria
14.5 x 13 x 4 cm
Quartz, Sphalerite, Galena, Chalcopyrite and Pyrite
9th September Mine, Madan Ore Field, Rhodope Mountains, Smolyan Oblast, Bulgaria
14.5 x 13 x 4 cm
 Dioptase Crystal Cluster on Matrix
Tsumeb Mine, Otjikoto Region, Namibia, Africa
4 x 3 x 2.5 cm
Stilbite Crystals on Quartz
Jalgaon, Maharashtra, India
16 x 10 x 8 cm
Stibnite Crystal Cluster
Rosaura Mine, Chicia District, Huarochiri Province, Lima Department, Peru
7 x 7 x 6.5 cm
Stibnite Crystal Cluster
Wuling Mine, Jiangxi Province, China
15.5 x 2 x 2 cm
Calcite on Pyrite
Trepca Complex, Mitrovica, Kosdovpska Minicipality, Kosovo
11 x 7.5 x 4.5 cm
Celestite Geode
Sakoany Deposit, Katsepy, Mitsinjo, Boeny, Madagascar
14 x 10.5 x 6 cm

Fluorapophyllite Crystals with Stilbite on Matrix
Nasik, Maharashtra, India
21 x 15 x 8 cm
Ex-Edward David Collection
Mottramite on Matrix
Ojuela Mine, Mapimi, Durango, Mexico
8.5 x 6.5 x 4.5 cm
Pyrite on Calcite
Shangrao. Jiangxi, China
9.3 x 5.3 x 3.2 cm
A gorgeous big, isolated Calcite crystal on matrix from the Xianghualing Mine, where it is rare to find a Calcite specimen without any associated Fluorite. This is one of the better examples from the locality in terms of quality, aesthetics and crystal size. It is a large, compressed trigonal, colorless and very gemmy crystal measuring 6.6 cm across. and is beautifully perched on the underlying matrix. The crystal is pristine and there is even a second smaller "jewal" like crystal on the lower portion of the specimen. 
A large, lustrous, emerald green Dioptase crystal cluster sitting atop a contrasting matrix. The largest crystal meassures 2 cm in height. In fine condition.
 An uncommon specimen from Shangrao featuring a few groups of beautiful brasssy metallic Pyrite crystals, in pyritohedral form, but intergrown in a way resembling a "rosette"- like appearance. The largest Pyrite group measures 1.8 cm across, and they sit on a beautifully contrasting pinkish-orange colored Calcite matrix. The color of the Calcite is due to iron oxide inclusions. Very unique and attractice specimen in fine condition.
A nice specimen featuring a brassy concretion of Pyrite crystals capping a large plate of Quartz. In fine condition.
An attractive coverage of botryoidal, light green Prehnite crystals on a Calcite matrix. In fine condition,
An aesthetic formation of botryoidal rich green Malachite crystals. In fine condition.
A stunning specimen of lustrous, brilliant yellow Mimetite crystals on matrix. In fine condition.
An unusual bi - color Quartz crystal cluster with the left half exhibiting a golden hue due to inclusions of iron oxide. In fine condition.
A charming specimen featuring highly gemmy, lustrous lavender Fluorite crystals (rare for the mine) adorning a Calcite matrix. Even more beautiful in person, and in fine condition.
Beautiful, gemmy to translucent, lustrous purple Fluorite crystals, with textured surfaces, on Sphalerite from the Gordonsville Mine. In fine condition.
 A nice specimen of botryoidal, olive-green Mottramite over a thin Limonite matrix from the Ojuela Mine. In fine condition.
An aesthetic combination of highly lustrous, golden Pyrite crystals adorned with Calcite. In fine condition.
A nice geode with gemmy, light blue crystals of Celestite measuring to 2.5 x 2 cm. The crystals lining the cavity are pristine, but the outer edges of the geode exhibit some roughness often typical of these specimens.
 A nice spray of blackish Stibnite crystals on matrix from the Rosaura Mine. In very good condition.
A beautiful formation of stalagmatic snowy white Quartz with two lustrous, salmon colored Stilbite crystals. In fine condition.
From a new find in China, this specimen of botryoidal, translucent Fluorite exhibits a unique lustrous golden - lemon yellow color.  In fine condition.
An esthetic complex association of five minerals from the September Mine in Bulgaria. In fine condition.
Opposite Side
A very aesthetic stalagmatic formation of Malachite with intricate surface features. In fine condition.
A fine example of pink Smithsonite with nice contours from the El Refugio Mine. In fine condition.
Ed David was one of the great collectors of fine mineral specimens. This specimen reflects his fine eye for unique aesthetics with its splash of lustrous green Fluorapophyllite crystals positioned perfectly on contrasting brownish matrix, and with varying surrounding formations of cream colored Stilbite. In fine condition. 
 A very nice large, silvery, lustrous Stibnite crystal cluster from the Wuling Mine. In pristine condition.