Halide Mineral Collection

Blue John vase
A vase carved out of the mineral Blue John. The mineral is so far unique to one location in the Derbyshire Peak District, England

Blue John
Polished slice of Blue John from Derbyshire, England. The mineral is so far unique to one location in the Derbyshire Peak District, England

Halite
Large cubes of halite (sodium chloride) which is a common resource of salt. This specimen is from Orenburg, Russia

Fluorite, pale green octahedron
With calcite, galena and pyrite. Its properties include fluorescence and cubed crystals. Specimen from Glengowla East mine, Oughterard, Co. Galway, Eire

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

Mendipite is exclusive to the Mendips of Somerset. This specimen is from Merehead Quarry. Mendipite belongs to the oxyhalides and hydroxyhalides group

Chlorargyrite is a mineral consisting of silver chloride

Blue John specimen
A compact banded variety of Fluorite known as Blue John, found only in Castleton, Derbyshire, England. Specimen on display at the Natural History Museum, London

Fluorite
6mm octahedral purple crystal on calcite collected from the Smith Vein, 1987. Green centre of the crystal does not show on film. Specimen from Carrock mine, Caldbeck, Cumbria

Yellow fluorite
A specimen of yellow fluorite (calcium fluoride) with white quartz (silicon dioxide) and brassy chalcopyrite, from Caradon Mines, Liskeard, Cornwall

Fluorescent group
A group including amber, ruby, ivory, fluorite and opal photographed in ultra violet light. See 179 for the same group in white light

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