Native Metal Collection (page 5)

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

Thryomanes bewickii, Bewicks wren
Plate 18 from John James Audubons Birds of America, original double elephant folio (1827-30), hand-coloured aquatint. Engraved, printed and coloured by R. Havell (& Son), London

Olivenite comprises of (copper arsenate hydroxide). It is a rare copper mineral normally deep olive green in coluor. Specimen from Wheal Jewel, Gwennap, Cornwall

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

Lazulite comprises of (magnesium iron aluminum phosphate hydroxide) not to be confused with lazurite - as it looks and sounds the same is a rare ornamental and gemstone

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

Stephanite

Emeralds
Emerald is a variety of beryl (beryllium aluminum silicate). The green colour is attributed to small amounts of chromium. Specimens from the Natural History Museum, London

Gemstone series: sapphire
Sapphire, the blue variety of the mineral corundum (aluminium oxide). Sapphire can be found in a number of different colours. Specimen at the Natural History Museum, London

Birthstone Series: Peridot
Peridot, a gemstone from the Natural History Museum, London. Peridot is the birthstone for the month of August (along with Sardonyx). Photographed by Frank Greenaway

Birthstone Series: Blue Topaz

Birthstone Series: Topaz
Topaz has a chemical composition of aluminum silicate fluoride hydroxide and is the birthstone for the month of November (along with Citrine). Photographed by Frank Greenaway

Men with horned specimens, 1940
This photograph appeared in the August 1940 edition of Tin Hat, the anonymous and very unofficial bulletin that was produced on various Museum typewriters between 1939 and 1942

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

Nerodia erythrogaster, copperbelly snake
Hand coloured etching from The Natural History of Carolina, Florida and the Bahama islands (1731) Vol. 2 by Mark Catesby. Entitled The Copperbelly Snake

Gold specimens
A variety of gold specimens held at the Natural History Museum, London. Gold is an elemental metal. It occurs mainly as nuggets in rocks and alluvial deposits

Stony-iron meteorite
This meteorite is the product of atmospheric melting, as are stony achondrites. Specimen held at the Natural History Museum, London

Birthstone Series: Garnet
Garnet has a chemical composition of iron aluminium silicate. It is the birthstone of the month of January. Gemstone from the Natural History Museum collections, in London

The amalgamating room at a gold digging site, Halifax 1873
A photograph taken during the voyage of H.M.S. Challenger (1872-1876), funded by the British Government for scientific purposes

Mineral replacement
This piece of wood has been replaced with metallic copper. Specimen is from the Mavovouni mines, Cyprus 2, 300 BP. Specimen on display at the Natural History Museum, London

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

Gersdorffite comprises of (nickel arsenic suphide). It is associated with hydrothermal veins and magma derived from sulphite deposits. Specimen from the Natural History Museum, London

Torbernite

Tellurium (Te) is a rare elemental metal, but is mostly used in alloys with other metals. Specimen from the Natural History Museum, London

Verdite
Polished surface of a verdite specimen from Jamestown, Transvaal. Verdite is also known as Africas Green Gold. It is a silicate mineral and often used for decorative carving and sculpture

Natrolite
A specimen of the mineral natrolite (Hydrated sodium aluminum silicate), of the group zeolite, from Neubauerberg, Bohemia

Pyrite specimen

Slab of the Lueders meteorite
A slab of the IAB iron meteorite Lueders showing the size, shapes and distribution of silicate inclusions. The slab is about 10cm wide

Piece of the Henbury iron meteorite
A pice of the Henbury iron meteorite, 28cm across, which once formed part of an asteroids core

The Beddgelert (H5) ordinary chondrite
Photograph of the Beddgelert (H5) ordinary chondrite, clearly showing flecks of iron-nickel metal

Hematite group
A group of hematite

Casuarina equisetifolia, beach sheoak
Copper plate of Casuarina equisetifolia, beach sheoak from the original drawing by Sydney Parkinson made during Captain James Cooks first voyage across the Pacific, 1768-1771

Aleurites moluccana, candlenut tree
Copper plate of Aleurites moluccana, candlenut tree from the original drawing by Sydney Parkinson made during Captain James Cooks first voyage across the Pacific, 1768-1771

Chrysocolla, (hydrated copper silicate)

Peridot group
Fine cut peridot of 146 carats (centre) with crystals and rough mass (right) from Zebirget, and Hawaiian basalt containing olivine crystals (left)

Star rubies and sapphires
Star stones of ruby and sapphire, both are varieties of the mineral corundum (aluminium oxide). Ruby always appears in red where as sapphire comes in a variety of colours

Ruby and Sapphire cut stones

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

Benitoite crystal and cut stone
Benitoite was discovered in 1906 near the San Benito river in California which remains the only known locality for this (barium titanium silicate) mineral

Spodumene crystal and cut stone
Large spodumene (Lithium Aluminum Silicate) crystal and cut gemstone from Brazil

Jade and gold casket (Lid open)
This casket was given to the Duchess of Cornwall and York in 1901 inscribed From many Loyal Women of the Province of Aukland

Gold nugget, The Welcome Stranger
Model of the largest true gold nugget ever found in Australia. It weighed 2520 oz (about 1.5cwt) and yielded 2284 oz of pure gold

Alexandrite
A twinned alexandrite crystal. Alexandrite is a variety of chrysoberyl (beryllium aluminum oxide) and is named after the former Czar of Russia, Alexander II

Dendritic gold growth
Gold (Au) is an elemental metal. Dendritic or branching gold growth on a specimen from Hopes Nose, Devon, England, length 5cm

Ruby
A six-rayed star ruby. Ruby is the red variety of the mineral corundum (aluminium oxide)

Topaz crystals and faceted topaz showing a diverse colour range. Topaz comprises of (aluminum silicate fluoride hydroxide)

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