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Marble with forsterite which has been hydrated to serpentine. Found in Ledmore Quarry, Sutherland. Scottish Highlands. Specimens are supplied in a card tray with a information label.
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Marble with forsterite is a metamorphic rock which is composed of the mineral forsterite,which is a magnesium silicate, the pure variety of olivine. If water gets in as the rock cools, it breaks down to serpentine, which gives the yellow-green colour. This marble is derived from the metamorphosed Durness Limestone. Ordovician-Cambrian.These specimens are supplied in a white 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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Samples of graphitic schist from the Pre-Cambrian Dalradian formation, making them among the oldest rocks in the country. The samples come from the Ben Eagach schist formation at Foss mine, Scotland, UK and were collected by our own members of staff. The rock contains mica and graphite, which gives the specimens their unique mica appearance and greasy graphitic texture and lustre.
74 in stock
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.
6 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.
54 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.
78 in stock
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.
Out of stock
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.
76 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.
69 in stock
Augen Gneiss is a foliated metamorphic rock with large crystals of lenticular or eliptical shear bound microcline.
13 in stock
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.
28 in stock
Greenschist metamorphic rock specimens from Scotland, exhibiting excellent schistose texture and folliation and a deep green colouration due to the presence of chlorite and serpentine. Specimens are available in various sizes and supplied in a card tray with a data label.
76 in stock
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.
59 in stock
Eclogite is a rare metamorphic rock, these specimens come from Scotland and exhibit the two major minerals expected, red garnets and green omphacite. However, both minerals appear to be much darker in colour when compared to Norwegian material. Our stock of this is fairly low now, and only smaller size pieces are available, they will come supplied in a card tray with a data label.
Out of stock
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