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Oxides and Hydroxides

Oxides and Hydroxides

247 results

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Whewellite

$900

Schacht 38 Mine, Germany

Whewellite is a relatively rare organic mineral, a hydrated calcium oxalate. This is a near-perfect,

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Pyrolusite

$500

Luthersteufe Mine, Germany

Black, metallic, acicular needles of Pyrolusite to 8 mm densely cover a small matrix of massive mixed

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Pyrolusite ps. after Calcite

$450

Ilfeld, Germany

An excellent pseudomorph of coal-black metallic Pyrolusite replacing a stack of rhombohedral Calcite crystals

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Cassiterite

$500

Wheal Clarence, UK

A great example of well crystallised Cassiterite forming gemmy crystals along a cavity in a massive

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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

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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

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Brookite

$400

Twll Maen Grisial, UK

Prenteg, close to Porthmadog in north-west Wales, is famed for its magnificent Brookite crystals. In

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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

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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

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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.

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Goethite on Smithsonite

$500

A somewhat unusual specimen of a heavy, thick crust of chocolate brown Goethite overgrowing clear rhombohedral

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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

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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

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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

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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

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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

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Calcite and Hematite

$200

Egremont, England

An aesthetic domed specimen of 3 to 5 mm nail-head Calcite crystals from the Egremont iron mining

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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

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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

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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

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Goethite

$850

Restormel Royal Iron Mines, England

The iron oxyhydroxide mineral Goethite was once abundant at the Restormel Royal Iron Mine close to Lostwithiel

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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

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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

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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

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Tantalite-(Mn)

$750

Nazareno, Brazil

A choice double terminated crystal of Tantalite-(Mn) from the São João del Rei pegmatite province of Nazareno

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Tantalite-(Mn)

$850

Nazareno, Brazil

An excellent orthorhombic crystal of Tantalite-(Mn) from the São João del Rei pegmatite province of Nazareno

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Tellurite

$750

Moctezuma Mine (Bambolla Mine), Sonora

An neat specimen of straw yellow bladed crystals of Tellurite on a metallic silvery Tellurium-rich matrix.

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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

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Manganite

$5,000

Ilfeld, Germany

A true German classic. Well-formed jet black crystals of Manganite with a near-mirror like lustre from Ilfeld,

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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

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Quartz var. Amethyst

$2,850

Banska Stiavnica (Schemnitz), Slovakia

A neat aesthetic Amethyst from the classic European locality Banská Stiavnica (Schemnitz), Slovakia. The

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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

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Senarmontite

$300

Djebel Haminate Mine, Algeria

A single grey octahedral crystal with several intergrown smaller crystals of Senarmontite from Djebel Hammimat

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Cassiterite

$400

Cornwall, England

Lustrous light to dark brown intergrown crystals of Cassiterite measuring to around 5 mm are associated with

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Cuprite

$450

Wheal Phoenix, England

Red areas of the Cuprite variety Chalcotrichite measuring to 1 cm, also with crystals of Cuprite investing

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Hematite

$350

Florence Mine, England

A classic small cabinet specimen of Kidney Ore Hematite from Florence Mine, Egremont, Cumbria.

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Hollandite

$250

Fullabrook Mine, England

A rare example of lead grey Hollandite from the Fullabrook Mine, Braunton, Devon. Forming a botryoidal

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Psilomelane

$300

Restormel Royal Iron Mines, England

A rare example of botryoidal grey-black Psilomelane seldom seen from the Restormel Royal Iron Mine,

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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

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Hematite with Quartz

$4,000

Florence Mine, England

A classic excellent specimen of Specular Hematite crystals richly intergrown with gemmy colourless pyramidal

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Hausmannite

$450

Wyndham Mines, England

Sooty black massive manganese oxide forms a dense matrix shot through with shallow vugs, most of which are

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Cuprite

$150

Wheal Gorland, England

Bright metallic looking octahedral crystals of Cuprite measuring in the 1-2 mm region, associated with silvery

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Goethite

$200

Restormel Royal Iron Mines, England

A classic specimen of Goethite from the Restormel Royal Iron Mine, Lostwithiel, Cornwall. Crystals measuring

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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

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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

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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

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Hematite with Quartz

$150

Wheal Cock, England

Abundant metallic black well-formed crystals of Hematite measuring to 4 mm mostly adorn a 'Limonite' coated

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Cassiterite

$200

St Agnes, Cornwall

Lustrous dark brown crystals of Cassiterite measuring to 4 mm on a Hornfels matrix from the St. Agnes Mining