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Cut diamond and crystalsA cut diamond surrounded by rough crystals. Diamond is comprised of compacted carbon and is the hardest natural substance known on Earth
Zircon cut stonesCut stones showing the natural colour range and lustre of zircon. Zircon is the birthstone of December. It comprises of (zirconium silicate) and is not the same as the artificial gem cubic zircona
Small boy walks with dog along the tideline - Tenby BeachA small boy walks with his dog along the tideline on Tenby Beach, Pembrokeshire, Wales. The water sparkles in the back light Date: 1988
Mica schist is a rock resulting from the metamorphism of shale. Specimen originates from Grantown-on-Spey, Murrayshire
Angel in coat and scarf on a Christmas card. Date: circa 1890s
FALL / LABRADOR / MIX GROUPA mixed group of three black & a yellow labrador. L to R: MARINA, SPARKLE, BRIDGET and GLEAM of TUDDENHAM. Owner: Butchart Date: 1972
Starry village with snow and Christmas sleighSnowy village at Christmas with starry night and Santas sleigh in the street. Date: 1960s
CinnabarTwinned dark red cinnabar crystals with small quartz crystals. Cinnabar comprises of (mercury sulphide). Specimen from the Natural History Museum, London
Greetings card in the shape of a green leaf with flowersGreetings card in the shape of a green leaf with pink flowers. Date: circa 1890s
Chrome diopsideTwo variations of a diopside gemstone (calcium magnesium silicate). Left: Deep-green faceted cut stone; locality unknown. Right: Small translucent green detached crystal from Outokumpu, Finland
Corundum groupA collection of crystals including ruby and sapphire particolor, ruby rhomboid, and hexagonal cut sapphire
Marcasite comprises of (iron sulphide). It is similar in appearance to pyrite, but has a different structural composition
Topaz comprises of (aluminum silicate fluoride hydroxide). This is a specimen from the collections of the Natural History Museum, London
Pleochroism in an iolite cut stoneThis iolite (magnesium aluminium silicate) is displaying pleochroism, a varied colour effect as the gem is turned. See also 3960
Birthstone Series: Rose QuartzA specimen of Rose Quartz from the Natural History Museum, London. Rose Quartz is the birthstone for the month of January (along with Garnet). Photographed by Harry Taylor
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
Diamond and simulantsFive gemstones showing dispersion and light spill. Left to right: strontium titanate, cubic zirconia, diamond, YAG, and synthetic white sapphire
A selection of topaz cut stonesTopaz is the hardest silicate mineral and comprises of (aluminum silicate fluoride hydroxide)
Many colours of corundumRuby and sapphire cut corundum stones viewed through their pavilions. Corundum is the second hardest natural mineral known
ChondroditeChondrolite comprises of (magnesium iron silicate fluoride hydroxide) and often occurs in a granular form in crystalline limestones. Specimen from the Natural History Museum, London
Birthstone Series: SardonyxA specimen of Sardonyx, a variety of quartz, from the Natural History Museum, London. Sardonyx is the birthstone for the month of August (along with Peridot). Photographed by Harry Taylor
Birthstone Series: TanzaniteA specimen of tanzanite, from the Natural History Museum, London. Tanzanite is the birthstone for the month of December (along with Zircon and Turquoise). Photographed by Harry Taylor
Augelite comprises of (aluminum phosphate hydroxide). This specimen has well developed semi-transparent crystals and is from the Natural History Museum, London
Benitoite crystal and cut stoneBenitoite 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 stoneLarge spodumene (Lithium Aluminum Silicate) crystal and cut gemstone from Brazil
Citrine and amethyst are both varieties of quartz (silicon dioxide)
GarnetsFaceted garnets showing a range of colours. Garnet is the birthstone of January
SapphireA six-rayed star blue sapphire. Sapphires derives from the corundum mineral group which is the second hardest group known
ZirconsFaceted zircons showing various colours and high lustre, from Sri Lanka. Zircon comprises of (zirconium silicate) and is not the same as the artificial gem cubic zircona
Imitation emeraldA faceted teardrop synthetic emerald
Opal doubletsOpals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)
AdamiteA specimen of the mineral adamite (zinc arsenate hydroxide). It is a fluorescent mineral, popular among collectors and shows bright green fluorescent under UV lights
Benitoite cut stoneBenitoite was discovered in 1906 near the San Benito river in California which remains the only known locality for this (barium titanium silicate mineral)
Orange sapphireA rare Sri-Lankan hexagonal cut orange sapphire. Sapphires belong to the corundum group - the second hardest mineral group known
SinhaliteA 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
A large cut citrineCitrine is the yellow and orange variety of quartz (silicon dioxide). Specimen held at the Natural History Museum, London
Fibrolite is an aluminium silicate. It is a rare variety of the mineral sillimanite. This stone from Burma shows blueish-violet and pale yellow pleochroic colours
Demantoid garnet cut stoneDemantoid is a variety of andradite garnet. It is green in colour, sometimes with yellow shading
Sequin Restaurant GownA decollete restaurant gown profusely ornamented with sequins, with short puffed sleeves, Swiss belt, floral corsage & bell shaped trained skirt. N.B hat