Phosphate Mineral Collection

Magnesite
Dyed magnesite specimen

Emu egg
Fresh emu eggs are a dark turquoise colour, which fades over time if they are preserved

Susannite on Caledonite
4mm crystal of susannite (carbonate) in a mass of caledonite (suplhate). Specimen from the Roughton Gill mine, Caldbeck Fells, Cumbria

Turquoise variety Henwoodite
A specimen of the turquoise variety called Henwoodite, named after William Jory Henwood (1805-1875) from West Phoenix Mine, Linkinhorne, Cornwall

Wavellite
Aggregates of honey-coloured wavellite forming radiating needles on slate. Wavellite comprises of (hydrated aluminum phosphate hydroxide). Specimen from Filleigh, Devon

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

Variscite
A rare, bluish green, mineral, found in aluminum-rich rocks. Variscite comprises of (hydrated aluminum phosphate)

Metatorbernite
A specimen of the mineral metatorbernite which contains uranium, copper and phosphorus. It is also radioactive

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

Wardite is comprised of hydrated sodium aluminum phosphate hydroxide. This bright green specimen has been deposited in variscite nodules

Pyromorphite

Autunite comprises of (hydrated calcium uranyl phosphate). This is a green, radioactive, highly fluorescent mineral. This specimen is from the Natural History Museum, London

Phosphophyllite comprises of (hydrated zinc iron manganese phosphate). Blue-green specimen from the collections of the Natural History Museum, London

Augelite comprises of (aluminum phosphate hydroxide). This specimen has well developed semi-transparent crystals and is from the Natural History Museum, London

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

Lazulite comprises of (magnesium iron aluminum phosphate hydroxide) not to be confused with lazurite - as it looks and sounds the same is a rare ornamental and gemstone

Pycnodus zeaformis Longbottom, fish tooth plate
Corn-on-the-cob fish tooth plate from a paratype specimen dating from the Lower or Middle Eocene phosphates; Tamagu?lelt, Gao region, Mali

Torbernite

Imitation turquoise
A slab of imitiation turquoise. True specimens of turquoise are among the most valuable non-transparent minerals

Apatite (calcium (fluoro, chloro, hydroxyl) phosphate). It is a source of phosphorous for fertilisers, but rarely as a gemstone or mineral

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

Turquoise vein in shale
Turquoise (hydrated copper aluminum phosphate) vein in shale, from Victoria, Australia. Turquoise is perhaps the most valuable non-transparent mineral

A collection of turquoise specimens
Rough, polished and worked specimens of turquoise (Hydrated Copper Aluminum Phosphate). Turquoise is perhaps the most valuable of the non-transparent minerals

Turquoise
Four different examples of worked turquoise. Turquoise (hydrated copper aluminum phosphate) is perhaps one of the most valuable non-transparent minerals

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