Oxides and Hydroxides

 

247 results

Whewellite
$900
 Schacht 38 Mine, Germany
Whewellite is a relatively rare organic mineral, a hydrated calcium oxalate.  This is a near-perfect,
Pyrolusite
$500
 Luthersteufe Mine, Germany
Black, metallic, acicular needles of Pyrolusite to 8 mm densely cover a small matrix of massive mixed
Pyrolusite ps. after Calcite
$450
 Ilfeld, Germany
An excellent pseudomorph of coal-black metallic Pyrolusite replacing a stack of rhombohedral Calcite crystals
Cassiterite
$500
 Wheal Clarence, UK
A great example of well crystallised Cassiterite forming gemmy crystals along a cavity in a massive
Connellite with Malachite and Chalcophyllite
$2,500
 Wheal Unity, Cornwall
An absolutely superb specimen of the hydrous copper chloro-sulphate Connellite from the enigmatic Wheal Unity
Nasonite in Datolite and Goethite
$300
 Torr Works Quarry, England
Nasonite is one of the Holy Grails from the rare oxychloride suite occasionally found in Torr Works quarry at
Brookite
$400
 Twll Maen Grisial, UK
Prenteg, close to Porthmadog in north-west Wales, is famed for its magnificent Brookite crystals.  In
Crednerite with Malachite on Calcite
$400
 Torr Works Quarry, England
Platy black crystals of the Cu-Mn oxide Crednerite line vugs in crystalline snow-white Calcite within by a
Cassiterite variety Wood Tin (2 pieces)
$800
 Goss Moor, England
The fibrous variety of Cassiterite called ‘Wood Tin’ is one of those great classics of Cornish mineralogy and
Otavite with Rosasite and Cerussite
$850
 Tsumeb Mine, Namibia
Otavite, a cadmium carbonate, was the first new mineral to be discovered at Tsumeb, being named in 1906. 
Goethite on Smithsonite
$500
A somewhat unusual specimen of a heavy, thick crust of chocolate brown Goethite overgrowing clear rhombohedral
Quartz with Hematite
$1,500
 Changjiang Uranium ore field, China
A gorgeous and arresting group of “Rock Crystal” Quartz crystals to 5 cm on an aesthetically contrasting
Indite with Dzhalindite (Specimen & Polished Mount)
$500
 Dzhalinda Sn Deposit, Far-Eastern Region
Minerals incorporating the element Indium (In) are far from common and these two specimens, a small sawn slice
Corundum var. Sapphire
$6,000
 Ratnapura, Sri Lanka
A stunning double terminated crystal of Sapphire, a variety of Corundum, from the rich gem-bearing district of
Diaspore (twin)
$600
 Muğla Province, Turkey
A V-twin of gemmy greenish-lemon Diaspore from the famous occurrence in Muğla Province in the Aegean Region of
Brookite with Quartz
$400
 Kharan District, Balochistan
A stunning, perfectly terminated blade of chocolate-brown Brookite measuring 2.8 x 1.2 x 0.1 cm developed
Calcite and Hematite
$200
 Egremont, England
An aesthetic domed specimen of 3  to 5 mm nail-head Calcite crystals from the Egremont iron mining
Hematite on Quartz
$900
 Cumbria, England
An attractive dome of slightly smoky Quartz crystals cover a solid Hematite core and with one side coated in
Crednerite with Malachite and Hydrocerussite
$5,000
 Torr Works Quarry, England
The famous Torr Works quarry (usually referred to as Merehead quarry) produced a suite of wonderful minerals
Quartz on Hematite
$900
 Cleator Moor Iron Mine, Cumbria
Double terminated, slightly smoky Quartz crystals to 2.5 cm richly cap a dome of black metallic Hematite
Goethite
$850
 Restormel Royal Iron Mines, England
The iron oxyhydroxide mineral Goethite was once abundant at the Restormel Royal Iron Mine close to Lostwithiel
Hematite with Quartz
$500
 Florence Mine, England
A lozenge-shaped cavity measuring 6 x 10 cm (maximum dimensions) in a matrix of massive Hematite, is lined
Dolomite on Quartz with Hematite
$750
 Agnes Mine, Cumbria
A beautiful showy specimen of golden-deep tan Dolomite coating two L-shaped faces of a creamy-white Dolomite
Hocartite with Rhodostannite, Cassiterite, Ferberite and Sphalerite
$300
 Oploca Mine, Jujuy
A complexly mineralised vein structure with dark grey well indurated slate on one side, the associated wall
Tantalite-(Mn)
$750
 Nazareno, Brazil
A choice double terminated crystal of Tantalite-(Mn) from the São João del Rei pegmatite province of Nazareno
Tantalite-(Mn)
$850
 Nazareno, Brazil
An excellent orthorhombic crystal of Tantalite-(Mn) from the São João del Rei pegmatite province of Nazareno
Tellurite
$750
 Moctezuma Mine (Bambolla Mine), Sonora
An neat specimen of straw yellow bladed crystals of Tellurite on a metallic silvery Tellurium-rich matrix.
Galena with Siderite on Quartz
$1,750
 Neudorf, Germany
A pleasing miniature of highly lustrous Galena with caramel brown rhombohedral Siderite crystals on a Quartz
Manganite
$5,000
 Ilfeld, Germany
A true German classic. Well-formed jet black crystals of Manganite with a near-mirror like lustre from Ilfeld,
Mimetite
$300
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A choice thumbnail of highly lustrous yellow-green Mimetite crystals from the Tsumeb Mine in Namibia with
Quartz var. Amethyst
$2,850
 Banska Stiavnica (Schemnitz), Slovakia
A neat aesthetic Amethyst from the classic European locality Banská Stiavnica (Schemnitz), Slovakia. The
Quartz (Japan-Law Twin)
$1,250
 Brandberg, Namibia
A beautiful double-terminated heart-shaped Japan-Law twin of Quartz from the Brandberg Area of Namibia. A
Senarmontite
$300
 Djebel Haminate Mine, Algeria
A single grey octahedral crystal with several intergrown smaller crystals of Senarmontite from Djebel Hammimat
Cassiterite
$400
 Cornwall, England
Lustrous light to dark brown intergrown crystals of Cassiterite measuring to around 5 mm are associated with
Cuprite
$450
 Wheal Phoenix, England
Red areas of the Cuprite variety Chalcotrichite measuring to 1 cm, also with crystals of Cuprite investing
Hematite
$350
 Florence Mine, England
A classic small cabinet specimen of Kidney Ore Hematite from Florence Mine, Egremont, Cumbria.
Hollandite
$250
 Fullabrook Mine, England
A rare example of  lead grey Hollandite from the Fullabrook Mine, Braunton, Devon. Forming a botryoidal
Psilomelane
$300
 Restormel Royal Iron Mines, England
A rare example of botryoidal grey-black Psilomelane seldom seen from the Restormel Royal Iron Mine,
Cuprite with Arsenopyrite
$225
 Wheal Gorland, England
Crystals of octahedral Cuprite in the 1-2 mm range are associated with metallic silvery Arsenopyrite in a
Hematite with Quartz
$4,000
 Florence Mine, England
A classic excellent specimen of Specular Hematite crystals richly intergrown with gemmy colourless pyramidal
Hausmannite
$450
 Wyndham Mines, England
Sooty black massive manganese oxide forms a dense matrix shot through with shallow vugs, most of which are
Cuprite
$150
 Wheal Gorland, England
Bright metallic looking octahedral crystals of Cuprite measuring in the 1-2 mm region, associated with silvery
Goethite
$200
 Restormel Royal Iron Mines, England
A classic specimen of Goethite from the Restormel Royal Iron Mine, Lostwithiel, Cornwall. Crystals measuring
Cuprite var Chalcotrichite
$500
 South Caradon Mine, England
Areas of bright red intergrown nests of acicular Chalcotrichite measure to 1 cm x 0.5 cm in a Quartz gossan
Hematite with Quartz
$5,000
 Florence Mine, England
A classic specimen of Florence Mine Specular Hematite crystals on Kidney Hematite with well-formed crystals of
Cassiterite
$750
 Goonbarrow China Clay Pit, England
Lustrous dark brown to yellow-brown crystals of Cassiterite measuring to 1 cm on a Granitic matrix from the
Hematite with Quartz
$150
 Wheal Cock, England
Abundant metallic black well-formed crystals of Hematite measuring to 4 mm mostly adorn a 'Limonite' coated
Cassiterite
$200
 St Agnes, Cornwall
Lustrous dark brown crystals of Cassiterite measuring to 4 mm on a Hornfels matrix from the St. Agnes Mining