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Augite andesite igneous rock specimens from Thirlmere, Cumbria, UK which are of late Ordovician age which form part of the Barrowdale volcanic group. The samples are of intermediate composition and contain phenocrysts of the pyroxene mineral, augite, giving the normally dark blue rock a black speckled appearance. The samples are available in 3 sizes and come supplied in a card tray with a label.
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Augite andesite is a variant of the fine grained igneous rock, andesite which contains coarse grained phenocrysts of augite crystals. An extrusive rock of intermediate composition, containing between 50 to 63% of silica, the samples have a dark colour with a blue tint while the augite crystals provide a speckled black appearance. The rock is estimated to have formed during the late Ordovician period and forms part of the Barrowdale volcanic group with other rocks such as dacite and basalt also being present in the area as part of a pre-caldera formation. The rock is slightly denser than our regular line of andesite due to the added pyroxene crystals of augite as phenocrysts. Ideal for established collections and higher level education to exhibit the presence of phenocrysts in igneous material, the rock samples come from Thirlmere, Cumbria, UK and are available in 3 sizes and come supplied in a card tray with a label.
Weight | 130 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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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.
69 in stock
Augite andesite igneous rock specimens from Thirlmere, Cumbria, UK which are of late Ordovician age which form part of the Barrowdale volcanic group. The samples are of intermediate composition and contain phenocrysts of the pyroxene mineral, augite, giving the normally dark blue rock a black speckled appearance. The samples are available in 3 sizes and come supplied in a card tray with a label.
100 in stock
Specimens of white tabular baryte crystal beds from Cumbria, UK. Ideal for collectors of British mineral specimens. Samples are supplied a white car tray with an information label.
Specimens of iridescent goethite with quartz from Graves Mountain, Georgia, U.S.A. These peculiar pieces are a must have for any mineral collector. Various sizes are available, samples are supplied in a white card tray with an information label.
Specimens of pink baryte from Dirtlow Rake, Castleton, Derbyshire, UK. These attractive specimens would make an ideal addition to any mineral collection, samples are supplied in a white card tray with an information label.
An off white coloured streak plate made form porcelain, they are used by field geologists and students as a means of performing streak tests on minerals. This test simply involves one, scratching the surface of the tile with a particular rock or mineral, the coloured streak left behind then assists the user in determining the mineral, or minerals within a rock sample.
Beautiful Selenite tea Light Holders, each made from 100% natural selenite and equipped with a flat base. Each item showcases unique variations in colour, texture, and formations, making them one-of-a-kind. The soothing tones of quartz, create a captivating visual display that resonates with the serenity of nature. Each tea light holder is white in colour and features a flat base. Since these items are made from 100% natural selenite, please note that some scratches and staining may be visible. Enhance your home with our Selenite Tea Light Holders, bringing a touch of the earth’s beauty into your everyday life.
20 in stock
Angelite is a popular trade name for a variety of Anhydrite that is light blue-grey in colour, semi-transparent, fine grained and marketed as gem material. These specimens, along with most angelite, are from Lima, Peru and were collected near the Casapalca Mine at Casapalca, Huarochiri Province, Lima Department, Peru.
A display specimen of an uncut polyhedral agate from Paraiba, Brazil. The piece measures approximately 12.5 x 8 x 2.8 cm at its widest points and weighs roughly 277 grams.
1 in stock
Orange calcite mineral samples supplied by weight, this rich orange variation is due to the presence of iron hematite impurities within the crystals. These particular samples also show a more crystalline structure of calcite and is known as ‘massive’. This orange calcite is available by weight, starting from 500 grams, and is suitable for lapidary, educational and enthusiasts use. The pieces vary from 20 mm to 100 mm though most pieces will sit in-between and come supplied in a polythene bag with a label.
5 in stock
Beautiful Quartz tea Light Holders, each made from 100% natural quartz crystals and equipped with a cushioned base. Each item showcases unique variations in colour, texture, and formations, making them one-of-a-kind. The soothing tones of quartz, create a captivating visual display that resonates with the serenity of nature. Each tea light holder spans a spectrum of colours from clear to cloudy white, and we have equipped them all with a cushioned base. This protects your furniture from scratches or damage. Since these items are made from 100% natural quartz, please note that some scratches and staining may be visible. Enhance your home with our Quartz Tea Light Holders, bringing a touch of the earth’s beauty into your everyday life.
Specimens of Chrome Diopside that were collected from the Gusdal Olivine Pit, Åheim, Norway. These samples are best described as chrome bearing diopside. Diopside, a vivid green pyroxene mineral, features streaks of grey chromite that creates a stunning mineral sample that would be the perfect addition to any collection. Whilst many samples of chrome diopside tend to be crystalline in nature, our samples are unique as the feature a grainier, more crumbly texture. These specimens are in limited availability, so we recommend you move fast if you wish to add these stunning specimens to your collection. They are available in a range of sizes and come supplied in a white card tray with information label.
Specimens of Ironstone that have been collected from Breitung Mine, Marquette County, Negaunee, Michigan, USA. These specimens are a deep reddish brown in colour with some specimens exhibiting clear banding. Please note that banding is not visible on all pieces. These specimens are available in very limited supply with three sizes to choose from. They come supplied in a white card tray with information label.
Additionally we also have one large display piece available, measuring approximately 18cm x 15cm at its widest points. This display specimen exhibits a distinct botryoidal texture on its top surface, making it an intriguing and appealing specimen to add to any collection.
Specimens of milky quartz containing small amounts of lepidolite mica from Glen Gairn, Strathdon, Aberdeenshire, Scotland. These samples of quartz contain a pale lilac lepidolite mica which has a massive form. These pieces, ideal for British mineral collectors, are supplied in a white card tray with an information label.
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