Sulfate Mineral Collection

Plate 1 from Histoire naturelle? (1789)
Plate 1 Histoire Naturelle ou Mineralogie Complete, from Histoire naturelle: ou, Exposition des morceaux, les mieux choisis pour servir? (1789) by by Swebach Desfontaines

Linarite is a bright azure blue colour with crystal growth to nearly 25mm. It comprises of (lead copper sulphate hydroxide). Specimen from the Natural History Museum, London

Sunday stone, a calendar in rock
Formed in a Tyneside coal mine in the 1800s, the white mineral barium sulphate, settled out in a water trough and during working shifts was blackened by coal dust

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

Thenardite
A specimen of the mineral Thenardite (number 1929, 1859) held in the Natural History Museums Mineral Department

Birthstone Series: Lazurite

Gypsum is comprised of (hydrated calcium sulphate). It forms from the evaporation of highly saline waters producing massive beds

Cerussite
Aggregates of white crystals on globular crystalline baryte. Cerussite comprises of (lead carbonate). Specimen from Frank Mills mine, Christow, Devon

Connellite
Deep-blue velvety crust of needles with some red cuprite. Connellite comprises of (hydrated copper sulphate chloride hydroxide). Specimen from Wheal Muttrell, Gwennap, Cornwall

Celestite
A mass of celestite crystals. Celestite is strontium sulphate and is the source of red colours in fireworks

Caledonite comprises of (copper lead carbonate sulphate hydroxide) and is characterized by small, well-formed intricate crystals. This specimen is from the Natural History Museum, London

Anhydrite
A specimen of the mineral anhydrite (calcium sulphate) from the Simplon tunnel through the Alps which links Switzerland to Italy

Amethyst, baryte dioptase, rhodochrosite
Amethyst, purple crystals from India. Baryte, long yellow prisms from Cumbria. Dioptase, green lustrous crusts from Namibia. Rhodochrosite, pink crystals on quartz

Baryte
Specimen of the mineral Baryte from Wheal Mary Ann Menheriot, Cornwal, England

Opal
Fire opal in a matrix slab of alunite from Guatemala. Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)

Desert rose specimen

Brochantite
A specimen of the mineral brochantite (copper sulphate hydroxide) from the Fowey Consols mine, St Blazey, Cornwall. A rippled green mass of minute crystals, with similar (but blue-green) langite

Celestine

Baryte crystals
Yellow prisms of the minreal baryte (BaSO4) on hematite (iron oxide) from Dalmellington Mine, Frizington, Cumbria

Lapis lazuli from Afghanistan
Polished slab of lapis lazuli containing some brassy-coloured pyrite. Lapis lazuli (sodium calcium aluminum silicate sulphur sulphate) is a rich blue opaque, semi-precious stone

Belt-hook in lapis lazuli
Carved chinese belt-hook on a piece of rough lapis lazuli from Badakhstan. Lapis lazuli (sodium calcium aluminum silicate sulphur sulphate) is a rich blue opaque, semi-precious stone

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