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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.
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Garnet mica schist is a variation of mica schist, a metamorphic rock formed by medium grade metamorphism which is usually a combination of both heat and pressure applied to the original rock, often a clay, mud or shale. These rock specimens are composed mainly of muscovite mica, with minor occurrences of quartz and feldspar, however, these specimens also exhibit the presence of numerous garnet crystals, which can be seen as red dots on the rock. These garnets are known as porphyroblasts, and suggest that the environment of formation was at or in close proximity to a convergent plate boundary with medium grade regional metamorphism taking place. The garnets are stronger than the muscovite crystals and so in some instances, it will appear as though the garnets are pushing the mica crystals around it. These rocks come from Fauske, a region of Northern Norway, and are available in 2 sizes. Specimens will be supplied in a card tray with an information label.
Weight | 130 g |
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Mineral Specimen Size | 2" x 2", 3" x 2" |
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Hand samples of serpentine bearing conglomeritic clasts (rounded pebbles). The samples were collected from the Lalm-Sel area in the Caledonides of central Norway and are supplied in card trays with a name label.
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A rare, green marble dating back some 700 million years to the end of the Pre-Cambrian. This marble comes from the Streamstown quarry in Clifden, Co. Galway. Specimens ( max size 3″ x 2″) are supplied in a labelled card tray.
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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.
Specimens of serpentine found in Modum, Southern Norway. Specimens are supplied in a card tray with a information label.
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.
196 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.
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