R - Z Archives - Geology Superstore

Brimstone – Elemental Sulphur £1.00 – £3.25 ex VAT
Brimstone (elemental sulphur). A soft, bright yellow mineral. These specimens are a by-product of the oil & gas refining process.

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30 in stock
Red Garnets (10g) £2.00 ex VAT
Small specimens of rough red garnets found in Kola Peninsula, Russia. Specimens are supplied in a small polythene bag in lots of 10 g and are a few millimetres in size. Due to their rough grading these specimens are not of high gem quality.

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Rhodochrosite £1.50 – £2.25 ex VAT
Rhodochrosite is an eye catching pink mineral specimen and often highly sought after. The colouration is derived from manganese but gives a white streak. It forms in hydrothermal veins alongside other manganese minerals usually in low temperature ore deposits, the mineral was first found in the Silver mines of Romania, however, large deposits have since been found in Argentine, where it is also the countries national gemstone. These particular specimens also include banding and come from the Capillitas mine, 11,000 ft elevation. Catamarca, Argentina. The mineral itself takes a high polish, and the beautiful rose pink colouration and banding make it a much sought after mineral and gemstone. Specimens are mainly available in small sizes & are supplied in white card tray with information label.

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Rhodolite Garnets in Mica Schist and Quartz £2.40 – £6.40 ex VAT
Rhodolite garnets in quartz and mica schist matrix from Southern Norway exhibiting bright vibrant pink coloured garnets in a white quartz and metallic grey mica schist with a start contrast of colours, these minerals specimens are available in 3 sizes and come supplied in a card tray with a label.

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Rhodonite – Peru £2.00 – £20.00 ex VAT
Rhodonite specimens from Peru display a signature pink color, and are of manganese silicate composition. They also contain significant amounts of magnesium, iron, and calcium (Mn,Fe,Mg,Ca)SiO3.

Rhodonite, an uncommon mineral, typically thrives in metamorphic rocks and other manganese-rich regions. It claims its presence in nine main localities: Argentina, Australia, Brazil, Canada, England, India, Russia, Sweden, and Peru, along with a few states in the USA.

These specimens boast a massive crystal structure, granting them a granular appearance, while the rarer ones boast red, triclinic crystals.

You can obtain these specimens in various sizes, neatly packaged in a white card tray complete with an informative label.

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Rock Crystal £2.25 ex VAT
Rock crystal mineral specimens from Madagascar, part of the quartz family of minerals, rock crystal is the clear or transparent variation of quartz, the most common mineral at the earths surface. These samples may show a conchoidal fracture and are suitable for collectors, enthusiast or educational use. Supplied in a card tray with an information label.

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Rock Crystal Point £1.50 – £6.00 ex VAT
Specimens of Rock Crystal Points, collected from Madagascar. Rock Crystal is a term that describes clear quartz. Quartz is a silicate mineral and one of the most abundant on the planet. These specimens are available in multiple sizes and come in a card tray with an information label.
- Small: Measures between 1 – 2″
- Large: Measures between 2.5 – 3″
All specimens supplies in a white card tray with information label.
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Rose Quartz £2.25 – £6.00 ex VAT
Rose quartz is a well know variation of quartz, easily identifiable due to its rose pink colouration, these fine crystalline mineral specimens are ideal as gifts, collectors, enthusiast and for use in education. These samples come from Namibia, Africa and the colour is due to iron impurities during the time that the quartz was forming, which tends to be a hydrothermal mineral and forms in veins. These specimens are very crystalline and may have sharp edges, care is advise when handling. They can be supplied in a range of sizes and supplied in a card tray with an information label.

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395 in stock
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Rubellite £34.50 ex VAT
Rubellite mineral specimens, a vibrant, rich pink variation of tourmaline, these samples are of excellent quality, exhibiting long prismatic crystal with rich colouration, sizes of piece vary but all a high grade, supplied with a stand and an information label.

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Out of stock
Ruby in Fuchsite – Tanzania £1.00 – £2.25 ex VAT
Specimens of Ruby in Fuchsite, collected from Mundarara Mine, Arusha Region, Tanzania. Ruby is a well known gemstone and variety of corundum that is red is colour. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Ruby in Pargasite – Tanzania £1.50 – £3.50 ex VAT
Specimens of Ruby in Pargasite, collected from Mundarara Mine, Arusha Region, Tanzania. These samples of pargasite are dark in colour and contain small inclusions of ruby corundum. Specimens come in a white card tray with an information label.

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Rutilated Quartz £1.50 – £3.50 ex VAT
Rutilated quartz is a variation of quartz which contains thin fibrous rutile crystals within it, often randomly orientated. Rutiles are a titanium mineral, dense and black, it is a common accessory mineral in high-temperature and high-pressure metamorphic rocks and in igneous rocks but found in very few locations around the world. These mineral specimens are of a dull, sometimes yellow coloured quartz which contain the rutile crystals.Where as most minerals devalue when they contain impurities or inclusions, rutilated quartz is in fact often prized for this very reason. These samples are available various sizes and will come supplied in a card tray with an information label.

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Rutilated Quartz Tumblestones £2.50 ex VAT
Rutilated quartz tumblestones, excellent quality clear quartz also known as rock crystal with titanium rutile crystals within. The clarity of the quartz makes the rutile mineral easy to see, the gemstones are between 2 to 3 cm in size and supplied as 1 or more.

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31 in stock
Salt Pseudomorph £2.38 – £6.37 ex VAT
2" x 2"3" x 2"4" x 3"
Specimens of Salt Pseudomorphs on a limy matrix, collected from the Triassic Aust Cliff in Avon, UK. Salt Pseudomorphs serve as important inicators of paleoenvironmental conditions. They typically form in semi arid (dry) climates, where saline water evaporates, which leaves behind cubic salt crystals. These salt crystals later dissolve, occasionally preserving their cubic imprints These specimens are available in multiple sizes and come supplied in a white card tray with an information label.

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20 in stock
Selenite – Morocco £1.50 – £6.00 ex VAT
Specimens of Selenite, collected from Morocco. Selenite is a variety of the mineral gypsum, featuring a pearly lustre and clear, translucent colour. These particular samples are crystal clusters which show an amalgam of multiple crystals which have merged or grown together during formation. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Skarn (Andradite Garnets) – Namibia £3.00 – £12.00 ex VAT
Specimens of Skarn, rich in andradite garnets and green amphibole, which have been collected from Namibia. Skarn is a term used a describe a range of coarse grained, metamorphic rocks, that are rich in a group of minerals known as calc-silicate minerals. These are minerals that are rich in calcium-magnesium-iron-manganese-aluminium and silica. Due to this, the composition and appearance of skarn material can vary greatly between pieces. These pieces happen to be rich in andradite garnets, with inclusions of green amphibole. This results in these specimens being mostly reddish brown in colour. They are available in multiple sizes and come supplied in a white card tray with information label.

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Skutterudite £1.15 – £23.00 ex VAT
- TOXIC SUBSTANCE !
Skutterudite is a arsenide cobalt mineral specimen from Bou Azzer District, Morocco. It has a metallic lustre and can be rare, associated with minerals such as silver, cobalt, erythrite, baryte and more, these mineral specimens are available in small sizes only and come with an information label.
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Smokey Quartz £2.07 – £5.54 ex VAT
Smokey quartz mineral specimens collected from Iveland, Norway, these highly crystalline samples are a dark grey colour and may have sharp edges, caution is advised. The colour is due to natural irradiation during the formation process, samples are available in various sizes and come supplied in a card tray with a data label.

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Smokey Quartz Points £2.25 – £3.00 ex VAT
Smokey quartz is a dark variation of quartz, it is often translucent and a shade of black or grey however, some specimens may be completely opaque and black. The colour is due to free silicon at the time the quartz was forming, formed from silicon dioxide from natural radiation. These particular mineral specimens are of the individual crystal points and are of very high quality, they display the quartz crystals termination very well and exhibit a very dark grey sometimes black colouration with minimal transparency, almost opaque. The crystals come from Madagascar and come supplied in two different sizes, in a white card tray with information label. Please note that size variation is approximate, and will vary between pieces.

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Soapstone £2.25 – £6.00 ex VAT
Soapstone mineral specimens collected from Otta, central Norway. Composed primaraly of talc, these samples thus have a greasy or waxy texture, they also contain chlorite schist, giving the specimens a shimmering green colouration with a metallic lustre. Avaialble in various sizes and supplied in a card tray with a data label.

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Sodalite £1.20 – £6.00 ex VAT
Sodalite mineral specimens with a rich royal blue colouration, named due to its sodium content, it is part of a family of minerals which include hauyne, nosean, and lazurite and is a well known ornamental gemstone. Very eye catching and beautiful for colectors of those wanting something striking to show, samples are available in two sizes and come supplied in a card tray with a data label.

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Out of stock
Specular Hematite – Cumbria £4.00 – £10.00 ex VAT
Specular Hematite, also known as specularite is a variation of haematite which has a silver or black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals with an anhedral form on a massive haematite matrix. These specimens display veins of specularite within a matrix of massive haematite. They come from Cumbria, UK and are available in various sizes, each sample comes supplied in a card tray with an information label. They would be of particular interest to those who are particular keen on collecting British mineral specimens.

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Specular Hematite Massive – Brazil £1.80 ex VAT
Massive specular hematite from Brazil, black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals in a massive form, therefore the samples have a highly crystalline texture. They come from Brazil and give off a metallic shimmer when held under certain lighting. Available in various sizes and supplied in card tray with an information label.

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Sphalerite – Weardale £2.50 – £10.00 ex VAT
Specimens of Sphalerite, collected from Weardale, UK. Sphalerite is a zinc sulphide mineral, as well as the primary zinc ore. Whilst sphalerite can come in a range of colours, including yellow, brown or red, these pieces display metallic grey – black crystals instead. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Staurolite – France £1.15 ex VAT
Staurolite crystal coffins from France, a name given to single staurolite crystals due to their elongate monoclininc crystal habit. The samples are dark brown in size and are between 1 to 3 cm in length, ideal for serious collectors, they are of the single crystals as opposed to the cruciform twinning that many will expect. Supplied in a small card tray with a label.

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26 in stock
Stibnite – Morocco £1.38 – £2.99 ex VAT
Stibnite mineral specimens form Morocco, exhibiting a massive crystalline texture, grey colouration with a metallic lustre. Soft as expected, the mineral leaves a grey streak. As it is a sulfide mineral, children should not handle these samples. They will be supplied in a card tray with an information label.

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479 in stock
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Stibnite – The Knipe £3.00 ex VAT
Rare specimens of stibnite from the Knipe, Hare Hill, New Cumnock, Ayrshire, Scotland, U.K. These specimens are from the Knipe mine and so are uncommon to obtain in large quantities now. All specimens are sold in a 1.5″ x 1.5″ card tray with an information label.

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Out of stock
Stilbite £2.50 – £12.00 ex VAT
Stilbite mineral specimens from Pune district, Maharastra, India, excellent samples with tabular crystal forms and a pink to pale orange colouration and vitreous lustre which makes the surface of the mineral look wet. Ideal for children, enthusiast and educational bodies. Stilbite is a well known mineral which belongs to the zeolite group. Available in various sizes, the pieces will come supplied in a card tray with a data label.

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Strontianite £5.00 – £10.00 ex VAT
Specimens of Strontianite, collected from France. Strontianite is a rare strontium carbonate mineral making it one of the most crucial raw materials for the extraction of strontium. These samples are pale green in colour, and some may show fluorescent properties. These specimens are from France, collected at Pontault-Combault, Torcy, Seine-et-Marne. These specimens are available in three different varieties:
- Strontianite Crystal Beds (Measuring approximately 3″ – 4″ in size)
- Cut Matching Pairs (each segment measuring approximately 2″ – 3″)
- Cut Single Segments (each segment measuring approximately 2″ – 3″)
Each of these variations is available in limited supply, and comes supplies in a white card tray with information label.
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Sulphur – Baja £1.61 – £2.90 ex VAT
Sulphur mineral specimens (also spelt sulfur) from Baja, Mexico, these fine crystalline masses give off a pungent odour as expected of this mineral and have a pale yellow colouration to them. They formed in volcanic zones and are excellent for the more serious collector. Supplied in a card tray with a data label.

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Sulphur – Bolivia £4.60 – £9.20 ex VAT
Sulphur mineral specimens (also spelt sulfur) from Bolivia, these fine crystalline masses give off a pungent odour as expected of this mineral and have a pale yellow colouration to them. They formed in volcanic zones and are excellent for the more serious collector. Available in one size only and supplied in a card tray with a data label.

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13 in stock
Sulphur – Indonesia £3.50 – £12.00 ex VAT
Specimens of Sulphur, collected from Indonesia. Sulphur is a well known mineral which is often various shades of yellow in colour, but more known for the pungent odour the it gives off. It forms in areas associated with natural hot spring or volcanic activity and historically was coined ‘brimstone’. Sulphur is mined and used for its acidic properties such as in fertilisers, pesticides and other industrial chemicals. These specimens are available in two sizes and come supplied in a white card tray with information label.

Small: Approximately 2 inches

Large: Approximately 3 – 4 inches

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Sulphur – Nevada £2.00 – £6.50 ex VAT
Specimens of Sulphur, collected from Nevada, USA. Sulphur is a mineral with a bright yellow colouration, and distinct pungent odour. These specimens are available in multiple sizes and comes in a white card tray with an information label.

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4 in stock
Talc £2.00 – £6.00 ex VAT
Specimens of Talc, collected from Egypt. Talc is a common clay mineral that is easily identifiable due to its greasy texture. Talc is extremely soft, with a hardness of just 1 on Mohs scale and is also the primary component in talcum powder. These specimens are pale green in colour. They are available in multiple sizes and come in a white card tray with an information label.

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196 in stock
Talc Sticks (5 Pack) £2.00 ex VAT
Pack of 5 Talc Sticks for £2.00 Approx size = 12cm x 1.5cm. Ideal for Hardness testing.

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Tektite £2.30 ex VAT
Tektite mineral specimens which were collected from Thailand, and have formed an irregular ‘tear drop’ shape. Each specimen measures 10 – 20mm approx in size. Radiometric dating gives an approximate age of 700,000 years old. Specimens are irregular in shape and are mainly black & opaque with a glassy lustre on fractured surfaces.

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Thulite £2.25 – £6.00 ex VAT
Thulite mineral specimens from Lom, central Norway. A massive form of this mineral which exhibits excellent rose pink colouration and a fine crystalline texture, the samples were collected by staff and are very pure. We can offer pieces in various sizes and they will come supplied in a card tray with a data label.

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80 in stock
Tigers Eye (Blue) £1.50 – £6.00 ex VAT
Specimens of Tigers Eye, collected from South Africa. Tigers Eye is a famous gemstone, due to its high quality, crystal habit, and ability to take cutting and polishing. These specimens are examples of blue tigers eye, being a mixture of brown and grey/blue colours with a silky lustre. They are available in multiple sizes and come in a white card tray with an information label.

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Tigers Eye (Gold) £1.50 – £6.00 ex VAT
Specimens of Tigers Eye, collected from South Africa. Tigers Eye is a famous gemstone, due to its high quality, crystal habit, and ability to take cutting and polishing. These specimens are examples of gold tigers eye, being a mixture of gold and brown colours with a silky lustre. They are available in multiple sizes and come in a white card tray with an information label.

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Topaz Crystals £2.07 ex VAT
Topaz crystals from the famous Topaz mountain, Utah, USA. these mineral specimens exhibit both yellow crystal along with bixbite, which is grey. They are small in size, only around 1 cm in length and so come supplied in a magnifier box with a data label for easier viewing. A well known semi precious gemstone due to its facetting and variety of colour, many will have seen topaz in jewellery at some point in their lives.

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Tourmaline – Madagascar £1.50 ex VAT
Tourmaline crystal specimens from Madagascar, the mineral pieces are highly crystalline and completely black in colour, opaque and of high grade. Samples are 1 – 2 cmin size will come supplied in a card tray with an information label.

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24 in stock
Tourmaline – South Africa £3.00 ex VAT
Specimens of Tourmaline, collected from South Africa. Tourmaline is a crystalline mineral and semi precious stone, due to its various potential colours. It is a boron silicate compound which usually appears jet black in colour. These particular mineral specimens come from South Africa and are clean and free of matrix, but the crystalline nature of the mineral is easily visible. These specimens are 1 – 2 inches in size will come supplied in a card tray with an information label.

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Turquoise £2.07 – £6.33 ex VAT
Turqoise mineral specimens of a low grade from South Africa, a well known mineral due to its semi precious status, its colour is due to the presence of oxidised copper within, which turns turqoise. Samples are supplied in a card tray with an information label.

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Ulexite £1.50 – £8.00 ex VAT
Specimens of Ulexite, collected from Türkiye. These specimens are off white in colour and have a fibrous texture. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Ulexite – Cut £1.50 – £3.50 ex VAT
Cut ulexite mineral specimens from California, USA. A mineral similar to gypsum, ulexite is able to transmit light through its long axis, meaning if placed above an image or text, will transmit it to the samples surface as an image. Hence the name TV rock, excellent for children, these pieces are available in several sizes and will come supplied in a card tray with an information label.

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Vanadinite £3.00 – £15.00 ex VAT
Vanadinite mineral specimens with a striking rich red to orange colouration formed as crystal masses on a limestone bed. The crystals vary in size and were collected in Mibladen, Morocco. It forms during the oxidation of lead ores in arid environments such as deserts. Samples are available in various sizes and supplied in a card tray with a data label.

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Vanadinite Crystals £0.92 ex VAT
Vanadinite hexagonal crystals found in Morocco. Specimens are supplied in a small polythene bag with an information label.

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Vesuvianite £2.50 ex VAT
Specimens of Vesuvianite, collected from Mexico. These specimens display partly formed crystals with a brownish yellow colouration. These samples range from 5 – 15mm and come in a polythene bag with an information label.

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25 in stock
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Wavellite £2.30 – £2.88 ex VAT
Wavellite mineral specimens with a vibrant green colouration and radiating crystal forms on a matrix, the specimens are partial but still easily visible. Ideal for enthusiasts and collectors, these particular specimens are supplied in perspex magnifier boxes with an information label.

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Out of stock
Witherite – Setlingstones Mine £1.50 – £6.90 ex VAT
These particular samples are a milky white to pale yellow colour and show typical fibrous crystal habit expected from Witherite. Samples are supplied in a white card with an information label.

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Wollastonite – Namibia £2.25 – £6.00 ex VAT
Specimens of Wollastonite, collected from Namibia. Wollastonite is a calcium inosilicate mineral, with a common chemical composition of CaSiO_3.Additionally, it may also contain small amounts of iron, magnesium or manganese. These specimens are off white – grey in colour and available in a range of sizes. Supplied in a white card tray with an information label.

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Wulfenite £6.90 – £17.25 ex VAT
Wulfenite crystals on matrix collected from Toussit, Morocco. Generally wulfenite occurs as thin tabular crystals; our specimens exhibit this textbook sharp laminar shape along with an intense yellow-orange colour.

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Zircon Crystals £0.50 ex VAT
zircon crystals from Brazil, excellent mineral specimens with tetragonal form, vitreous lustre and a rusty brown colour, these samples also fluoresce under shortwave ultra violet light to vibrant yellow colour, roughly 1 cm in size and supplied in a packet with a data label.

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