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GoyaziteScanning 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
LibetheniteWedge-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
ChalcophylliteChalcopyrite or copper pyrite comprises of (copper iron sulphide). Its a common mineral and found in almost all sulphide deposits
ErythriteErithrite comprises of (hydrated cobalt arsenate) and is characterized by its striking red-purple colouration and needle-like fibrous crystals
LiskearditeA 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
MimetiteA tall, orange prismatic crystal of mimetite. Mimetite comprises of (lead chloroarsenate)
AdamiteA specimen of the mineral adamite (zinc arsenate hydroxide). It is a fluorescent mineral, popular among collectors and shows bright green fluorescent under UV lights
ConichalciteA 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