Quartz Collection

Birthstone Series: Amythest Quartz
An Amythest quartz specimen. Amythest is a form of quartz that is usually purple in colour, it is the birthstone for the month of March. Natural History Museum specimen number 84817

Jasper
A polished slab of jasper from Campsie Fells, Stirlingshire. Jasper is cryptocrystalline agate quartz (silicon dioxide)

Agate bowl, grey and white
Agate is a decorative variety of cryptocrystalline quartz (silicon dioxide). This bowl specimen is from the collections of the Natural History Museum, London

Crucifix set with sapphires, zircon, spinel, cairngorm and amethyst. The whole cross is bordered by diamonds

King Alfred Jewel
The King Alfred Jewel, made on the orders of King Alfred the Great. It was discovered in 1693, in North Petherton, Somerset, and is now a popular exhibit at the Ashmolean Museum, Oxford

Mica and quartz rock formation in Brazil. Handcoloured copperplate engraving from Gottlieb Tobias Wilhelms Unterhaltungen aus der Naturgeschichte: Des Mineralreichs, Augsburg, 1828

Plate 51 from Mineralogie
Or natif en dendriet sur du quartz de Mr. Forster. From Recuille complet de Mineralogie? vol.6 (1790) by F.L. Swebach Desfontaines

Amethyst is the purple variety of quartz (silicon dioxide) and is a popular gemstone

Quartz crushing battery used during Australian gold rush
The first quartz crushing battery, used during the Australian gold rush, located at the base of Black Hill, Ballarat, Victoria. The quartz had to be crushed in order to extract the nuggets of gold

Mineraux - minerals
A variety of minerals including amethyst quartz, fluorine, agate and beryl. Date: 1930

Dr William Beebe, deep sea explorer, Bermuda
Dr William Beebe (1877-1962), American naturalist, ornithologist, marine biologist, entomologist, author and deep sea explorer, seen here in Bermuda

Quartz crystal - Collected by Matthew Flinders & Ferdinand Bauer, 16 February 1803, from Australia, Melville Bay. Coll. No. BM 75819 Date: 1803

Octahedral crystals in columns, quartz matrix
Groups of octahedral crystals forming columns in parallel position in quartz matrix. Presented by Percy Tarbutt in 1942 Date: 1942

Advert for Hanovia sunlamp 1929
Keep fit with " Homesun" sunlight. Bring sunshine into your home... Date: 1929

Quartz-feldspar porphyry
Geological specimen collected by Scotts British Antarctic Expedition 1910-1913, also known as the Terra Nova expedition. It had a broad scientific programme and collected thousands of geological

Pyrophyllite, green radiating in quartz from Berezovsk, Russia. Close-up of specimen on display in the Mineral Gallery at the Natural History Museum, London

Cinnabar
Twinned dark red cinnabar crystals with small quartz crystals. Cinnabar comprises of (mercury sulphide). Specimen from the Natural History Museum, London

Fortification agate
A section of fortification agate from Scurdie Ness. Agate is cryptocrystalline quartz. This specimen is from the collections held at the Natural History Museum, London

Mansion block, Johannesburg, Transvaal, South Africa
Mansion block of flats, Quartz Street, Johannesburg, Transvaal, South Africa. Date: circa 1930

Perched Rock, Mica Schist Resting on Quartz - a view of a perched rock on top of another one with a lady to the left for scale. (Location: Ireland). Date: circa early 1900s

Bloodstone or heliotrope carvings
These frogs were carved from bloodstone by Paul Dreher. Bloodstone is green agate containing speckles of red jasper. All these derive from the cryptocrystalline quartz group

Crystal balls are produced by grinding and polishing quartz (silicon dyoxide) cystal into spheres

Cursed amethyst
When the Mineralogy Department received this amethyst in 1943 they found a note inside the box: this stone is trebly accursed and is stained with the blood

Plate 3, fig 4 from Mineralienbuch
A illustration of a slice of polished brown jasper. Jasper is a variety of cryptocrystalline quartz (silicon dioxide). Plate 3, fig 4 from Mineralienbuch by F. A. Schmidt, Stuttgart 1855

Agate
This polished agate specimen from Saxony is called Breccia Sanguigna. This brecciated agate comprises mainly of irregular sized fragments of cryptocrystalline quartz, set in a finer matrix

Agate
A polished slice of agate from Uraguay. Agate (silicon dioxide) is a cryptocrystalline quartz

Plate 53 from Mineralogie
Mine de Plomb blanc en rayon et Colore du Hars tire du Cabinet de Mr. Aubert. From Recuille complet de Mineralogie? vol.6 (1790) by F.L. Swebach Desfontaines

Agate
A polished slice of agate or chalcedony from Uraguay. Agate (silicon dioxide) is a cryptocrystalline quartz

Birthstone Series: Citrine
Citrine is a form of quartz that appears in different a variety of yellows and oranges, it is the birthstone for the month of November along with Topaz. Specimen number 21470

Sapphire turban button
A rose-cut facetted deep-blue sapphire mounted in a button of quartz, inlaid with gold, rubies & emeralds. No 198 in the collection of Sir Hans Sloane

Amethyst crystals

Carved carnelian bowl
Carnelian is a transluscent yellow to orange variety of chalcedony (micro-crystalline quartz). This bowl was once the property of Sir Hans Sloane

Mocha stone, sardonyx and agate
Mocha stone and sardonyx cameos resting on artificially dyed slabs of agate. All these varieties of chalcedony derive from the cryptocrystalline quartz group

Chalcedony
Polished slab of chalcedony with radiating structure. Chalcedony or agate is a variety of cryptocrystalline quartz (silicon dioxide)

Birthstone Series: Rose Quartz
A 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

Aventurine
A rough piece of green aventurine quartz from India

Tiger s-eye and Hawk s-eye
Formed when blue crocidolite asbestos is replaced by quartz. Hawk s-eye retains the original colour while tiger s-eye contains a residue of iron oxide

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

Birthstone Series: Bloodstone
A specimen of the mineral bloodstone, a variety of quartz. (33974), from the Natural History Museum, London. Bloodstone is the birthstone for the month of March (along with Aquamarine)

Quartz variety amethyst

Chalcedony variety of quartz
A specimen of the mineral chalcedony, a variety of quarz, from the Haytor mine, Ilsington, Devon

Unakite

Citrine specimen

Citrine and amethyst are both varieties of quartz (silicon dioxide)

Agate
A cut and polished section of blue agate from Idar-Oberstein, Germany. Agate (silicon dioxide) is a cryptocrystalline quartz

Amethyst is the purple variety of quartz (silicon dioxide) and is a popular gemstone

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