Native Metal Collection (page 6)

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)

Kunzite crystal and cut stone
Strongly dichroic pink kunzite crystal and faceted kunzite. Kunzite (lithium aluminum silicate) is the pink variety of spodumene and is pleochroic

Labradorite carving

Topaz
Blue irradiated topaz pebbles and faceted topaz. Topaz is comprised of (aluminum silicate fluoride hydroxide)

Labradorite
A close-up of the surface of a rich blue specimen of the mineral labradorite from labrador. Labradorite (calcium sodium aluminum silicate)

Diverse gold nuggets
A diverse collection of gold nuggets from river gravels near Antioqua, Colombia. Deep yellow gold is practically pure whilst the white gold is electrum, an alloy containing significant silver

Bournonite or cog-wheel ore comprises of (copper lead antimony sulphide). Cog wheel ore contains the mineral chromite, though it is difficult to extract from crystals

Emerald on calcite
Well-formed hexagonal crystals of emerald on calcite. Emerald is a variety of beryl (beryllium aluminum silicate). The green colour is attributed to small amounts of chromium

The Wicklow gold nugget
The Wicklow Nugget was found in the Ballin valley stream, Co. Wicklow, Ireland in 1795. The nugget became the property of George III and weighed 682g

Topaz
Image of Queen Victoria carved in topaz. Topaz comprises of (aluminum silicate fluoride hydroxide)

Almandine garnets
Brooch set with almandine garnets. Almandine comprises of (iron aluminum silicate) and is the most common of the garnets

Tennantite
Crust of sparkling silvery metallic examples of tennanite (copper arsenic sulphide) some partly altered by copper rust in cavity in matrix. Specimen from Relistan mine, Cornwall

Chromite (iron chromium oxide) is the ore of chromium and has an attractive shiny surface. It is used in the manufacture of stainless steel and in metallic paints

Beryl
Deposits of the green variety of beryl (beryllium aluminum silicate) known as emerald. Specimens oginally from Ekatrinberg, Russia, now at the Natural History Museum, London

Beryl
A specimen of beryl (beryllium aluminum silicate). There are several varieties of beryl, aquamarine (blue), emerald (green), goshenite, heliodor and morganite

Brookite
A specimen of the mineral brookite (titanium oxide) from Tremadoc wales. Brookite is a polymorph, it has the same chemical composition as rutile and anatase

Emerald, a variety of beryl
A cut teardrop stone and a prismatic crystal of the green variety of beryl (beryllium aluminum silicate) known as emerald. Specimen from the Natural History Museum, London

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

Acanthite
A specimen of the mineral acanthite (silver sulphide). Acanthite is a sliver based mineral and black in colour

Almandite
A crystal and a cut stone of almandite, a deep red garnet comprised of (iron aluminum silicate). Specimen from the collections of the Natural History Museum, London

Benitoite 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)

Sinhalite
A round mixed cut of 15.5 carats. Silhalite comprises of (magnesium aluminum borate) and only known to derive from the gem gravels of Sri Lanka

Conichalcite
A specimen of the mineral conichalcite (calcium copper arsenate hydroxide). This mineral holds orthorhombic crystals and belongs in the Adelite group

Liroconite comprises of (hydrated copper aluminum arsenate hydroxide). It is blue in colour and forms from the oxidation of copper ores. Specimen from the collections of the Truro Museum, Cornwall

Banded iron formation
3, 000 million year old specimen of banded iron-rich chert from the Murchison Goldfield, Western Australia. The banding derives from differing amounts and oxidation state of the iron composite

Crystal structure
A cross-section through an iron meteorite which shows the alien crystal structure

Copper is an elemental metal. Seen here is a dendritic or branching native copper specimen from the collections held at the Natural History Museum, London

Azurite
A specimen of the mineral azurite (copper carbonate hydroxide) from Chessy, Dept Rhone, France

Beryl
From left to right, different varieties of berly (beryllium aluminum silicate) cut stone; emerald, aquamarine, morganite and heliodor

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