Fluorescence Collection

Natural ruby crystal
This ruby is a staggering 1, 085 carats. Mined in Burmas Mogok (Myanmar s) mines and bought by the Museum in 1924 from Burma Ruby Mines Ltd. It is one of the largest crystals in the Museum collection

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

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

Scheelite
Crystals of scheelite (calcium tungstate), an important ore of tungsten from the collections of the Natural History Museum, London

Diamonds fluorescing
Murchison snuff box set with diamonds fluorescing under ultra violet radiation. Gold snuff box set with diamonds ranging from 0.75 to 2.5 carats, presented to Sir R. I. Murchison by Tsar Alexander II

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

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

Franklinite, fluorescing
Ore of zinc fluorescing under ultra violet radiation: calcite - pink; willemite - green; zincite - blue; franklinite - black. See image number 388 for white light view

Willemite
A specimen of willemite (zinc silicate) photographed under UV light

Torbernite

Opal doublets
Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)

Adamite
A specimen of the mineral adamite (zinc arsenate hydroxide). It is a fluorescent mineral, popular among collectors and shows bright green fluorescent under UV lights

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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