Arsenate Collection

Goyazite
Scanning electron microscope image of the energy-dispersive X-ray spectrum of the mineral goyazite, obtained using Link AN10000 analysis system

Scorodite comprises of (hydrated zinc arsenate) and is characterized by brownish-green crystals. Specimen from the collections of the Natural History Museum, London

Libethenite
Wedge-shaped, dark green crystals of libethenite (copper phosphate hydroxide) with pale brown duftite. Specimen from the Phoenix mine, Lnkinhorne, Cornwall

Scotlandite comprises of (lead sulphite) and derives from the sulphates group. Specimen from the Natural History Museum, London originally from Leadhills, Lanarkshire, Scotland

Schultenite comprises of (lead arsenate hydroxide) and derives from the phosphates group. Specimen from the Natural History Museum, London

Descloizite is comprised of (lead zinc vanadate hydroxide) and is characterized by platy crystals with a rounded triangualr shape. Specimen from the Natural History Museum, London

Chalcophyllite
Chalcopyrite or copper pyrite comprises of (copper iron sulphide). Its a common mineral and found in almost all sulphide deposits

Erythrite
Erithrite comprises of (hydrated cobalt arsenate) and is characterized by its striking red-purple colouration and needle-like fibrous crystals

Liskeardite
A specimen of the mineral liskeardite from the Marke valley mine, Liskeard, Cornwall. Soft fibrous crystals, forming a pale-green botryoidal crust on a fine-grained matrix of chlorite and quartz

Olivenite comprises of (copper arsenate hydroxide). It is a rare copper mineral normally deep olive green in coluor. Specimen from Wheal Jewel, Gwennap, Cornwall

Mimetite
A tall, orange prismatic crystal of mimetite. Mimetite comprises of (lead chloroarsenate)

Adamite
A specimen of the mineral adamite (zinc arsenate hydroxide). It is a fluorescent mineral, popular among collectors and shows bright green fluorescent under UV lights

Conichalcite
A specimen of the mineral conichalcite (calcium copper arsenate hydroxide). This mineral holds orthorhombic crystals and belongs in the Adelite group

Liroconite comprises of (hydrated copper aluminum arsenate hydroxide). It is blue in colour and forms from the oxidation of copper ores. Specimen from the collections of the Truro Museum, Cornwall

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