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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.
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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. It is comprised predominantly of pale grey / white feldspars and quartz with small specs of dark mafic minerals. This particular material was collected from Threlkeld quarry, Cumbria, UK. Each section is made to 30 microns thickness. The glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy.
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Biotite muscovite granite specimens from St. Austell in Cornwall, UK of Permian age is a coarse grained igneous rock composed of quartz, plagioclase feldspar, biotite and muscovite. The rock is part of the St. Austell pluton which formed 280 million years ago. An off white colour with gold and black flecks of micas, the rock has a unique chemistry and resulted in the rich mineralisation of ores in the area. The samples are suitable for collectors and educational use to show granite variants, available in three sizes. Each piece will come supplied in a card tray with an information label.
79 in stock
Biotite granite thin section exhibiting abundant biotite crystals within a typical granite crystal mass. These thin sections supplement the hand specimens nicely and allow the crystallisation history of the rock to be interpreted.
Out of stock
Granite adamellite thin section slide exhibiting crystals of quartz, biotite and feldspar. We collected this material from the famous Shap Fell quarry, in Cumbria hence the rocks alternative name ‘ Shap Granite ‘.
Out of stock
Biotite granite from Spain exhibiting plagioclase feldspar, quartz and biotite mica, specimens have been cut and polished on one surface allowing easy viewing of the crystals without the aid of magnification.
Out of 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.
197 in stock
Pumice thin section slide exhibiting the highly vesicular nature of this extrusive igneous rock. Pumice lavas tend to be silicic or felsic which are highly viscous thus do not allow the gas bubbles to escape efficiently.This material was collected from the Lipari islands of Italy.
4 in stock
These thin sections exhibit beautiful crystals of olivine, pyroxene and augite, which often shows oscillatory zonation held within a matrix of plagioclase feldspar. The slides supplement the hand specimens nicely and are useful for interpreting the crystallisation history of the rock.
3 in stock
Gabbro thin section exhibiting some of the textbook features one would expect from this coarse, mafic igneous rock. These slides supplement the hand specimens nicely and are useful for interpreting the crystalisation history of the rock.
4 in stock
Welded tuff thin section slide exhibiting a jumbled mass of irregularly sized broken clasts held in situ by finer ash particles which have become welded together. This material was collected from Cumbria, the original rock is likely rhyolite, and indeed in hand specimen the tuff almost still looks like rhyolite and appears to show a form of banding.
2 in stock
Metaquartzite thin section slide exhibiting a fine, interlocking mosaic of quartz crystals characteristic of this metamorphic rock. Each section is made to 30 microns thickness and the glass is 46 x 27 mm, ideal for microscopy and educational purposes.This material was collected near Holyhead on the Isle of Anglesey, North Wales.
Out of stock
Millstone grit thin section slide exhibiting the coarse and siliceous nature of this British Carboniferous coarse sandstone. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.
Out of 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.
Out of stock
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.
Out of stock
Rhomb porphyry thin section exhibiting the textbook porphyritic texture of this rare igneous rock. The thin section shows a fine grained alkali feldspar groundmass with large phenocrysts of augite. This material was collected near Oslo in Norway.
6 in stock
Garnet Mica Schist thin section exhibiting textbook strain fabric and alignment of platy minerals within this popular metamorphic rock.This schist is from the Dalradian series, a complicated group of various metamorphic rocks which are dated to the Pre-Cambrian period and is present in both Scotland and Ireland.
Out of stock
Purbeck Limestone thin section slide exhibiting densely pack shells of varying fauna. This rock is particularly interesting in thin section; numerous shells from varying organisms such as bivalves and gastropods along with numerous signs of mineral replacement and dissolution offers an opportunity to interpret the complex diagenetic history of the rock.
Out of stock
Tufa thin section slide. Tufa is a variety of limestone, formed by the precipitation of carbonate minerals from ambient temperature water bodies. This particular material is from the Flandrian epoch of the Quaternary Period and it was collected in Caerwys, North Wales.
5 in stock
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