Crystal Collection (page 15)

Anatase
A brown to black single tetragonal crystal of anatase (titanium oxide). Anatase is a polymorph of rutile and brookite, meaning they carry the same chemistry, but with a different structure

Sphalerite or zinc blende
Dark crystals of sphalerite or zinc blende comprised of (zinc iron sulphide). Specimen from the collections of The Natural History Museum, London

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

Class Reptilia - Dinosauria, or Gigantic Lizards: Iguanadon
Class Reptilia - Dinosauria, or Gigantic Lizards:Iguanadon

Descloizite is comprised of (lead zinc vanadate hydroxide) and is characterized by platy crystals with a rounded triangualr shape. Specimen from the Natural History Museum, London

Crystal, carving and treated blue topaz
An orange crystal, colourless carving of Queen Victorias head and a heat-treated blue topaz gem of 0.24ct

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

Jamesonite comprises of lead iron antimony sulphide, and is characterized by hair-like fibrous crystals. This specimen is from the collections held at the Natural History Museum, London

Andradite is variety dementoid, garnet and comprises of (calcium iron silicate). These crystals are in a matrix from Lanzada, Valtellina, Italy and the cut stone is from an unknown locality

Gold can be rediposited during the processes taking place in the earths crust underneath volcanoes. Water traveling through cooled magma can collect minerals from igneous rock and move them elsewhere

Chondrodite
Chondrolite comprises of (magnesium iron silicate fluoride hydroxide) and often occurs in a granular form in crystalline limestones. Specimen from the Natural History Museum, London

Chalcophyllite
Chalcopyrite or copper pyrite comprises of (copper iron sulphide). Its a common mineral and found in almost all sulphide deposits

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

Braunite is a native oxide of manganese. Its crystals are dark brownish black in colour. Specimen from the Natural History Museum, London

Topaz
A crystal and a cut topaz stone from the collections of the Natural History Museum, London. Topaz comprises of (aluminum silicate fluoride hydroxide)

Jadeite crystal and cut stone
Jadeite comprises of (sodium aluminum iron silicate) and is actually not a mineral outright, but is a variety of the mineral actinolite. Specimens from the Natural History Museum, London

Tenorite is comprised of (copper oxide). It is found as grey to black metallic crystals and as a by-product of lava flows. Fibrous specimen 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

Kernite is composed of hydrated sodium borate hydroxide with transparent crystals. Kernite is also an important ore of borax. Specimen from 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

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

Erythrite
Erithrite comprises of (hydrated cobalt arsenate) and is characterized by its striking red-purple colouration and needle-like fibrous crystals

Liskeardite
A specimen of the mineral liskeardite from the Marke valley mine, Liskeard, Cornwall. Soft fibrous crystals, forming a pale-green botryoidal crust on a fine-grained matrix of chlorite and quartz

Stilbite comprises of (hydrated sodium calcium aluminum silicate) and derives from the Zeolite group. Specimen from the collections of The Natural History Museum, London

Thomsonite

Chalcosine, from the St Ives Consols mines, Cornwall
A specimen of the mineral chalcosine, a detached group of lenticular, pseudo-hexagonal crystals, the largest about 12 mm across from St Ives Consols mines, Cornwall, U.K

Emerald crystals and cut stone
Emerald is a variety of beryl (beryllium aluminum silicate). The rich, green colour is attributed to small amounts of chromium which is unmatched by any other mineral species

Beryl crystals
Beautifully formed beryly variety crystals of aquamarine, heliodor, morganite and emerald. Beryl comprises of (beryllium aluminum silicate)

Boulangerite comprises of (lead antimony sulphide) and is characterized by fine, fibrous crystals. This specimen is from the Natural History Museum, London

Quartz variety amethyst

Asbestos
Geometric asbestos crystals. Asbestos is a dangerous, fibrous amphibole mineral

Cassiterite, sparable tin
Dark-brown slender lustrous prisms of cassiterite (tin oxide) on brownish siderite and dark-green chlorite. Specimen from the Dolcoath mine, Camborne, Cornwall

Plate 43 from Mineralogie
Azur de Cuivre Cristallise du Bannal de Temeswar. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Plate 41 from Mineralogie
Morceau de Mine de Cuivre vert Soieux vitreux rouge et Pyriteux. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Plate 26 from Mineralogie Volume 1 (1790)
Spath calcaire incruste de pirites Cuivreuses. From Recuille complet de Mineralogie? vol.1 (1790) by F.L. Swebach Desfontaines

Plate 8 from Mineralogie
Mine de Fer Statique en Cretes de Coq sur un groupe de Cristaux de Roche. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Centipede in Baltic amber
Centipede, Chilopoda in Baltic amber. The centipede has been half polished away and is filled with pyrite crystals

Plate 99, from Mineralogie
Various gemstone varieties including diamond, ruby, sapphire, spinel and Topaz. From Recuille complet de Mineralogie vol.3 (1790) by F.L. Swebach Desfontaines

Plate 3 from Histoire naturelle? (1789)
Plate 3, Histoire Naturelle ou Mineralogie Complete from Histoire naturelle: ou, Exposition des morceaux, les mieux choisis pour servir (1789) by by Swebach Desfontaines

Plate 44 from Mineralogie
Azur de Cuivre en tres beaux Cristaux qui ofre ptusieurs varietes de l octaedre. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Plate 4a from Histoire naturelle? (1789)
Plate 4a Mineralogie, [unfinished] from Histoire naturelle: ou, Exposition des morceaux, les mieux choisis pour servir? (1789) by by Swebach Desfontaines

Plate 27 from Mineralogie Volume 1 (1790)
Moreau singulier de Calamine quis est incrustee sur du Spath piramidal, le qu els est decompose et a laisse la place vuide... From Recuille complet de Mineralogie? vol.1 (1790) by F.L

Plate 24 from Mineralogie
Mine de Fer grise de Saxe Coloree gorge de Pigeon. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Plate 11 from Mineralogie
Grouppe de Cristaux de Mine de Plomb blanche d Huegoet pres Poullaoen en Basse Bretagne. From Recuille complet de Mineralogie? vol.6 (1790) by F.L. Swebach Desfontaines

Plate 44 from Mineralogie Volume 1 (1790)

Plate 25 from Mineralogie
Mine de Fer Coloree et Cristallisee en Octaedres prismatique tres curieux. From Recuille complet de Mineralogie? vol.5 (1790) by F.L. Swebach Desfontaines

Mimetite
A tall, orange prismatic crystal of mimetite. Mimetite comprises of (lead chloroarsenate)

Unakite

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