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Dalradian mica schist is a famous metamorphic rock, composed mostly of the minerals muscovite mica with occurrences of quartz and feldspar, these rock specimens are Pre-Cambrian in age and come from Scotland, supplied in a card tray with an information label.
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Mica schist is a foliated medium grained metamorphic rock which characterised by its platy mica crystals oriented in a laminar fashion and its twinkling reflective appearance. The rock is often composed of at least 50% or more platy, elongated mica crystals, however, quartz and feldspar can also be present and sometimes garnets. Schists are often named depending on their main constituent minerals, with mica schist or schist being a term to represent them overall. The dominant mica in this particular schist is Muscovite & are from the Dalradian series, a complicated group of various metamorphic rocks which are dated to the Pre-Cambrian period, present in both Scotland and Ireland. These examples come from the Loch Shiel area, west of Fort William, Scotland. They are available in a range of sizes supplied in card trays with an information label.
Weight | 130 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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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.
Garnet Mica Schist . The specimen is mostly muscovite mica schist with a scattering of small pink or red garnets. Collected from Scotland. Supplied by weight, pieces come as they are in various shapes and sizes up to the weight of 1 kilogram. Packed in a polythene bag with an information label.
22 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.
Lewisian gneiss from Northwest Scotland, formed during the Pre-Cambrian period, making it among the oldest rocks in the UK, pushed to the surface during an oregenic event, Lewisian gneiss exhibits banded like most gneisses but is comprised of more dark, dense minerals, often igneous in origin. Specimens are available in 3 different sizes.
Serpentine is a green coloured schist rock, most famous from its type locality along the Lizard peninsula, Cornwall. These specimens come from the Isle of Anglesey, have a much more vibrant colour and are available in various sizes.
Out of stock
Mylonite exhibiting ribbon texture from Lom, central Norway, excellent rock specimens and rare to come by, available in various sizes.
61 in stock
Eclogite is an uncommon metamorphic rock, composed of mainly two minerals, reddish-brown garnets and omphacite, a green pyroxene. Other minerals, such as blue kyanite and white quartz may also be present. Over all, it is an attractive looking yet rare rock, with a vibrant green colouration with red garnets to break it up. These rocks come from Almenning, Norway. Specimens are supplied in card trays with labels and come available in 4 sizes.
Banded hornfels exhibiting an alternating band feature, likely due to the original rock being layered such as sandstone, shale etc. The specimens come from Kentellen, Scotland, are available in different sizes and come in a card tray, suitable for school use.
10 in stock
Tiger eye specimen, a metamorphic rock, often classified as a mineral, comprised of numerous golden brown fibrous crystals which stem from the mineral previously being asbestos. These samples come from South Africa and are available in 1.5″ size only and comes supplied in a card tray with a label.
4 in stock
Garnet Mica Schist from Fauske, Norway, displaying the details of regional metamorphism adjascent to a plate boundary. The garnet crystals stand out and protrude from the micaceous matrix. Specimens available in 2 sizes, and come supplied with a card tray and information label.
65 in stock
Glaucophane Schist is also known as Blueschist. The blue-green colour comes from the dominant presence of the minerals Glaucophane (amphibole) & Lawsonite (related to epidote). These specimens were collected from the Isle of Anglesey, North Wales.
49 in stock
Hornblende gneiss is a coarse grained metamorphic rock belonging to the gneiss family, its overall dark colouration is due to high levels of the mafic mineral hornblende, while quartz and feldspar are also present. The rock specimens come from southern Norway and are available in various optional sizes.
195 in stock
Biotite gneiss is a metamorphic rock found in Evje, Norway. These specimens exhibit alternating bands of black and white minerals, derived from quartz, plagioclase feldspar and biotite mica. Giving a surreal appearance, similar to the stripes of a zebra. The samples are available in various sizes and comes supplied in a card tray with a label.
74 in stock
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