Halide 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

Galena, Sphalerite, Bitumen and Fluorite, Ashover, Derbyshire, England
Grey galena, brown sphalerite, black bitumen and colourless fluorite. Collector Philip Rashleigh wrote in his mineral catalogue

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

Minerals, Blue John or Derbyshire Spar, surface of un-polished piece of fluorite mineral, from Blue John Cavern, Derbyshire, England

Wet plate process. Coating a glass plate with a collodion solution of halide. Wood engraving, French, 1876
PHOTOGRAPHY, 1876. Wet plate process. Coating a glass plate with a collodion solution of halide. Wood engraving, French, 1876

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

Fluorite. The specimens at bottom right and middle right are in their natural form, the specimen at centre had been polished and all the other specimens have been cut and polished

Aluminium reacting with iodine, in the presence of water, to produce aluminium iodide ((AlI3)2)

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"Exploring the Enchanting World of Halide: From Blue John Vases to Fluorite Octahedrons" Discover the mesmerizing beauty minerals found in various forms, such as the exquisite Blue John vase and specimen. Originating from Ashover, Derbyshire, England, these unique formations are composed of Galena, Sphalerite, Bitumen, and Fluorite. The surface of an un-polished piece reveals the captivating allure of Derbyshire Spar or Blue John mineral. Delve into the fascinating wet plate process captured in a wood engraving from 1876. Witness how glass plates were coated with a collodion solution containing halide compounds for photographic purposes. This technique showcases the versatility and significance of halides beyond their natural state. Marvel at the enchanting pale green octahedral structure of fluorite crystals that captivate collectors worldwide. Its vibrant hues create a visual spectacle that never fails to amaze. Additionally, explore other remarkable halides like Connellite and Mendipite which add further diversity to this intriguing group. Lastly, immerse yourself in the world of Halite – another prominent member within this family – known for its distinctive cubic crystal shape often used as table salt due to its sodium chloride composition. From geological wonders like Blue John vases to stunning fluorite octahedrons and even photographic processes involving halides; there is no denying the immense charm and scientific importance held by these captivating minerals.