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Garnet Amphibolite supplied in a card tray with a label. This attractive rock from southern Norway has highly prominent garnet porphyroblasts (also known as cherry cake).
Out of stock
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Phone: +1 (23) 456 789
Amphibolite is a metamorphic rock consisting mainly of amphibole, especially the species hornblende & actinolite. They can be derived from either the metamorphism of mafic rocks or poorly sorted sedimentary protoliths. Closer inspection of the locality is needed to determine the origin. This particularly attractive example from southern Norway has highly prominent garnet porphyroblasts & the nickname “cherry cake”. Specimens are supplied in a polythene bag in lots of 1 kg with a label.
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Garnet Amphibolite supplied in a card tray with a label. This attractive rock from southern Norway has highly prominent garnet porphyroblasts (also known as cherry cake).
22 in stock
Amygdaloidal Basalt is a variety of basalt from the Isle of Skye, specimens are supplied in a polythene bag in lots of 1 kg with a label.
47 in stock
Classic Gabbro specimens, showing typical coarse grained crystalline texture. Gabbro is an intrusive mafic igneous rock chemically similar to basalt.
44 in stock
Hornblende in massive form, collected from Norway, these mineral specimens exhibit a platy cleavage, black to dark green colouration and a dark grey streak. The samples are available in various sizes, show excellent vitreous lustre and will come supplied in a card tray with a label.
Out of stock
Igneous Basalt of Tertiary age from Northern Ireland. Specimens are typical black in colour and has a fine grained texture. Specimens are supplied in polythene bags in lots of 1 kg and are come with an information label.
75 in stock
Biotite Gneiss rock specimens collected from Evje, Norway. Specimens will show banding. Specimens are supplied in a polythene bag in lots of 1 kg with a 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.
195 in stock
This Mahogany obsidian is sourced in the United States of America. Impurities of magnesium and iron give this variety a red or brown appearance hence the name ‘mahogany obsidian’ or oak obsidian. Specimens are supplied in a polythene bag in lots of 1 kg with a label.
Out of 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
Rhyolite thin section slide exhibiting the fine grained nature of this felsic igneous rock. The thin section shows a silica rich mineral assemblage of fine grained quartz and plagioclase. Accessory minerals present include biotite mica and hornblende. This material was collected from Cumbria, UK.
7 in stock
Pink Granite, rich in potassium feldspars giving the distinctive pink hue, easily identifiable as a granite due to its mineral composition. Specimens come from Scotland and are supplied in a card tray with label.
8 in stock
Micro Granite is a variation of the granite group of rocks, composed of the minerals quartz, feldspar and mica. These particular samples were collected from Threlkeld quarry, Cumbria, UK. They are supplied in a small white tray with an information label.
195 in stock
Rhyolite specimens found in Cumbria. Rhyolite is a felsic (silica rich) rock, often formed in highly explosive volcanoes. Specimens are supplied in a card tray with label.
61 in stock
Rhyolite Felsite, a highly felsitic composed variation of Rhyolite, found in Scotland. Specimens are supplied in a polythene bag in lots of 1 kg with a label.
Microgranite thin section slide exhibiting the medium grained nature of this intrusive igneous rock. The crystals in microgranite are smaller than those of normal granite indicating that it cooled at a quicker rate.
We provide a full range of igneous, sedimentary, metamorphic and mineral thin sections. Click here to view them. Should you require a microscope, they can be found here.
9 in stock
Puddingstone conglomerate is a rare sedimentary rock from Hertfordshire, UK which formed during the Paleocene to Eocene period. Composed of rounded flint clasts within a silica matrix, this rock is quite hard and breaks with conchoidal fractures. Formed through erosion of flint pebbles which were later cemented by sand and silica, it is an excellent representation of conglomerate, detailing rounded clasts within a matrix. The specimens are available in 4 sizes and come supplied in a card tray with a label.
298 in stock
Shap granite igneous rock specimens from Shap Fell, Cumbria, UK which exhibit typical coarse grained crystalline textures expected of intrusive felsic rocks, being composed of quartz, plagioclase and orthoclase feldspar and biotite mica. This popular granite is very sought after for a variety of applications and has a colourful appearance. It is believed to have formed during the early Devonian period as a plutonic intrusion in the area and is quarried extensively. Samples are ideal for collectors of all levels and ages as well as all educational levels as the minerals can be easily described with the origin and processes being suitable to teach higher level students. Samples are available in three sizes and come supplied in a card tray with an information label.
Stunning peridotite thin section exhibiting the bright and beautiful colours of olivine and pyroxene punctuated by relatively abundant plagioclase. Peridotite is a dense, coarse grained, ultramafic igneous rock consisting largely of olivine and pyroxene.
4 in stock
Mahogany obsidian sourced from the United States of America. Impurities of magnesium and iron give this variety a red or brown appearance hence the name ‘mahogany obsidian’ or oak obsidian. Each Sample is supplied in a labelled card tray.
Out of stock
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