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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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A rare, green marble dating back some 700 million years to the end of the Pre-Cambrian. It is Serpentine rich containing around 36%. It can vary in colour from silver grey to a dark variegating jade green. It’s “40 shades of green” have made it a popular ornamental carving & facing stone. It was known to be traded as far back as Neolithic times. This marble comes from the Streamstown quarry in Clifden, Co. Galway. Specimens ( max size 3″ x 2″) are supplied in a labelled card tray.
Weight | 130 g |
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Specimen Size | 1.5 " x 1.5" |
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Metaquartzite collected from Onich near Ballachulish, Scotland, which detail text book quality metaquartzite, pure white, hard and composed mainly of quartz with very few impurities, these rock specimens are ideal for educational use or as part of a larger collection of rocks, supplied in a card tray with a label.
Greisen metamorphic rock specimens from Caldbeck Fells, Cumbria, composed mainly of quartz and mica with an off yellow colouration. The rock is known as an endoskarn and forms when hydrothermal fluid and heat alter a granitic body, resulting a heavily altered rock which may contain trace amounts of rare elements. These samples are suitable for advanced collectors and higher level education and are available in three sizes, each pieces will come supplied in a card tray with a label.
30 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.
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.
Chistolite slate is a variation of slate which also contains chiastolite crystals within it,the slate its self is either a brick red or plum colour with the chiastolite crystals appearing as white lines and randomly orientated within the rock matrix. rock specimens are available in various sizes and will be supplied in a labelled card tray.
Garnet mica schist from Loch Tay, Scotland, showing in excellent detail the effects of regional metamorphism along plate boundaries, the garnets push the mica crystals around it due to being stronger, the specimens are available in various sizes or as a cut and lacquered piece, supplied in a card tray with a data label.
56 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
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.
48 in stock
Metagabbro specimens from Lom, Central Norway. Also known as scapolite-hornblende due to the absence of feldspar in the rock are available in 3 optional sizes and come supplied in a card tray with a data label.
44 in stock
Slate from Wales, famous for its use as a roofing material, these specimens exhibit text book characteristics such as fine grain crystal structure, foliation, slatey cleavage and a variety of colours, excellent for educational use, supplied in various sizes.
52 in stock
Gneiss from Evje, Norway, containing more feldspar and quartz than Lewisian gneiss from Scotland, giving it a pink colour, these specimens show excellent banding and text book crystal structure, supplied in 3 sizes, ideal for educational use.
97 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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