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PRODUCTS BY WEIGHT
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BOX SETS
PLASTIC DISPLAY PRODUCTS
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White marble exhibiting medium interlocking crystals suggesting a limestone rock origin These particular specimens are from Torrin Quarry on the Isle of Skye, Scotland and are available in three optional sizes.
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Marble is a hard crystalline metamorphic rock, often white in colour, though not always and is found around the world and used in a variety of ways. It shows no foliation at all and is usually composed of carbonate minerals such as calcite or dolomite and as such, marble is often the metamorphosed result of limestone. (Although it should also be noted, that within the stone mason and building industry, the term marble may refer to a wide range of different rocks for the sake of simplicity). The rock exhibits a white colour and medium interlocking crystals, which suggests a limestone rock origin. These particular specimens are from Torrin Quarry on the Isle of Skye, Scotland. Perhaps the most well know use of marble is within the art industry and indeed many of us have most likely seen a number of marble statues or carvings in our lives. It is also heavily used in the construction sector as a building stone or decorative stone.
Weight | 130 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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White marble showing excellent crystal texture with a sugary appearance. Supplied by weight and come in lots of 1 kilogram bags .
This limestone is from the Dinantian epoch of the Lower Carboniferous. It was laid down approximately 350 million years ago in semi tropical seas. It is made up from the calcium rich shells, bones & skeletons of the fauna that was prevalent at that time. Some of their remains can be seen as well preserved fossils. Crinoid fossils are usually fragmented as they were quite delicate in life & tended to be broken up by currents after death. The Derbyshire limestone is very pure, about 98% soluble in rainwater (over time) leaving only residual clay. It is extracted for aggregate, building stone, the manufacture of cement, paper & calcium carbide. This example was quarried in the White Peak of Derbyshire. Specimens are supplied in labelled card trays.
100 in stock
Migmatites are an unusual rock that is a mixture of both igneous & metamorphic lithologies.The samples were collected by our staff and come from central Norway. Each specimen comes in a card tray with a label.
64 in stock
Mylonite exhibiting ribbon texture from Lom, central Norway, excellent rock specimens and rare to come by, available in various sizes.
58 in stock
Metaquartzite is a low grade metamorphic rock often composed mainly of quartz, however, other minerals can exist, and mineral impurities during crystalisation can result in differing colours, these particular samples from Anglesey have a green colouration to them. The rock specimens are available in 3 different sizes and come in a card tray with a data label.
Amygdaloidal basalt is an igneous rock which is extrusive in nature, these specimens formed over 60 million years ago during the Tertiary period and come from Ireland. They are part of the Antrim lava group and exhibit a dark colouration with occurrences of amygdales containing quartz and calcite crystals. As a basalt they are somewhat dense, but lighter than pure samples due to the cavities within them which formed as a result of gaseous activity during their ejection. Over time, hydrothermal fluids pass through the rock and minerals form within the cavities, which gives the usually dark coloured rock a speckled appearance. These samples are available in various sizes and are suitable for higher educational use to detail the subtle differences between similar igneous rocks, they come supplied in a card tray with an information label.
65 in stock
Micro Granite is a variation of the granite group of rocks, composed of the minerals quartz, feldspar and mica. These particular samples were collected from Threlkeld quarry, Cumbria, UK. They are supplied in a small white tray with an information label.
195 in stock
Pink Granite, rich in potassium feldspars giving the distinctive pink hue, easily identifiable as a granite due to its mineral composition. Specimens come from Scotland and are supplied in a card tray with label.
8 in stock
Essexite igneous rock specimens from Lanarkshire, Scotland, UK, also known as olivine or nepheline monzogabbro is an intrusive rock with mafic chemistry, composed of nepheline and plagioclase feldspar along with olivine, magnetite minerals as well as augite phenocrysts which exhibit euhedral crystal forms. The rock has a dense weight and overall dark colouration but attractive appearance. It is locally known as Crawfordjohns and was highly sought after as a high quality material to produce curling stones. These samples are excellent for young and older collectors as well as higher educational use, the pieces are available in three sizes and come supplied in a card tray with an information label.
58 in stock
Peridotite, found in Finland, is a dense, coarse grained igneous rock. It is commonly used in saunas due to certain porpertie. These rock specimens are ideal teaching aids or collectors specimens. Supplied in a card tray with label, offered in 3 optional sizes.
39 in stock
Hand size specimens of the big feldspar variant of gabbro, samples were collected from Carrock fell, Cumbria, UK and can be supplied in 3 sizes.
69 in stock
Olivine dolerite igneous rock specimens from Clee Hill, Shropshire, UK, composed of pyroxene minerals such as augite and magnetite as well as plagioclase feldspar. The samples are fine grained and crystalline in texture with a dense weight and black colouration. Similar in appearance to gabbro and basalt, the rock samples are suitable for serious collectors or higher level education to explain the difference in chemistry and mineralogy of igneous rocks. The samples are available in three sizes and supplied in a card tray with an information label.
66 in stock
Hornfels, dark blue or black in colour collected from Shap quarry, Cumbria, a strong, durable rock, splintery when broken is comprised of mafic minerals, the rock may also exhibit acoustic properties. Supplied in a sized up card tray with an information label.
31 in stock
Gabbro igneous rock specimens from Balmedie quarry, Aberdeen, Scotland which exhibit a coars grained texture from the crystals. Formed as a mafic pluton intrusion, the samples contain pyroxenes such as augite along side plagioclase feldspar, amphibole and olivine crystals. They are derived from a body known as the Belhelvie basic intrusion which the parent unit being the Caledonian Supersuite. Samples exhibit a grey colouration and density and are suitable for the more serious or professional collector or higher educational use to differentiate similar looking igneous rocks with different compositions and origins. Available in three sizes, the specimens come supplied in a card tray with an information label.
35 in stock
Ignimbirte welded tuff is a pyroclastic rock of any origin formed through volcanic processes, the rock appears to show streaks of welded material on some surfaces and appears to be rhyolitic on the inside. Specimens come from Cumbria and are available in various sizes.
77 in stock
This granite pegmatite contains large sheets of muscovite mica, orthoclase feldspar and quartz matrix. An excellent teaching material which comes from Southern Norway. Each specimen comes in a labelled card tray.
Out of stock
Obsidian is an extrusive igneous rock, these specimens exhibit a typical black colouration with conchoidal fractures, they come from South East Mexico and are excellent for educational use and collectors due to the quality. This igneous rock forms when magma extrudes onto the earths surface, chemically it is silica rich and impurities give the black colouration. It’s fine crystalline texture and fracture makes obsidian appear glassy and it breaks as such. The pieces are available in various sizes and come supplied in a card tray with an information label.
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