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Oxide Collection

Background imageOxide Collection: Cassiterite, Wherry Mine, Wherrytown, Penzance, Cornwall, England

Cassiterite, Wherry Mine, Wherrytown, Penzance, Cornwall, England
Cassiterite with quartz. A very rich tin ore of a brown colour with black crystals of a curious form on the surface intermixed with white quartz

Background imageOxide Collection: Cuprite with Minor Quartz, Gwennap, Cornwall, England

Cuprite with Minor Quartz, Gwennap, Cornwall, England
This specimen was drawn for Specimens of British Minerals, Selected from the Cabinet of Philip Rashleigh (1797, Volume 1, Plate 16)

Background imageOxide Collection: Cassiterite, Ulu Johan, Ipoh, Kinta district, Southern Perak, Malaysia

Cassiterite, Ulu Johan, Ipoh, Kinta district, Southern Perak, Malaysia
This large specimen of water worn cassiterite was brought to Cornwall from Malaysia by Redruth businessman James Wickett in 1910

Background imageOxide Collection: Hematite, Buxton, England

Hematite, Buxton, England
Massive, compact, water worn hematite, dark red in colour. The specimen label states Iron Ore, the best pieces are used for burnishing when polished - from Buxton or thereabouts

Background imageOxide Collection: Goethite with Calcite, Forest of Dean, Gloucestershire, England

Goethite with Calcite, Forest of Dean, Gloucestershire, England
Stalactitic goethite with colourless calcite crystals. This variety of goethite, known as brush ore, was high quality iron ore from the Forest of Dean, often containing between 60-65% iron

Background imageOxide Collection: Manganite, Warwickshire, England

Manganite, Warwickshire, England
Acicular manganite crystals on massive manganite. Manganite, which is a valuable manganese ore, was worked at Nuneaton and Hartshill in Warwickshire by the Cornish Mining Company from around 1820 to

Background imageOxide Collection: Cassiterite, Wheal Maudlin, Lostwithiel (formerly in Lanlivery Parish), Cornwall, England

Cassiterite, Wheal Maudlin, Lostwithiel (formerly in Lanlivery Parish), Cornwall, England
A superb twinned crystal of cassiterite. In Cornwall, cassiterite is concentrated in hydrothermal veins and pegmatites associated with granite intrusions

Background imageOxide Collection: Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England

Cassiterite Partly Replacing Orthoclase, Wheal Coates, St Agnes, Cornwall, England
Twinned crystals of orthoclase feldspar partially replaced by cassiterite. This rare kind of replacement, or partial pseudomorph, is best seen in specimens from Wheal Coates

Background imageOxide Collection: Cassiterite, St Agnes, Cornwall, England

Cassiterite, St Agnes, Cornwall, England
Large crystals of cassiterite, varying from black to dark brown in colour. In Cornwall, cassiterite is concentrated in hydrothermal veins and pegmatites associated with granite intrusions


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