Accretionary lapilli tuff is an igneous pyroclastic rock, these samples come from Longsleddle, Cumbria in the UK and forms when hot ash and debris is ejected from as volcano. Some of this material is held together by moisture and once heavy enough, falls into the ash below forming small ‘spots’ within the material, creating a speckled rock. The samples are suitable both for young and serious collectors as well as educational use and are supplied in various sizes with a card tray and label.
69 in stock
Agglomerate igneous rock specimens from Scotland, UK. A coarse grained, hard blocky rock exhibiting a conglomeration of various minerals and igneous material of volcanic origin. These samples formed part of the Glen Coe caldera and are apart of the upper streaky andesite unit, the exhibit poor sorting and orientation of material which indicates a somewhat violent origin but this can vary from agglomerates by location and is mainly down to the chemistry of the igneous material. The samples are available in 3 sizes and come supplied in a card tray with a label, they are suitable for educational use to show the different types of volcanic rocks produced as well as those interested in collecting rock samples.
84 in stock
Andesite igneous rock specimens of late Ordovician age which form part of the Barrowdale volcanic group. The rocks come from Cumbria, UK and have a dark colouration with a blue tint and may contain augite crystals. The rocks are intermediate in chemistry and suitable for higher level education to explain the difference in various igneous groups. Samples are available in 3 sizes and will come supplied in a card tray with an information label.
52 in stock
Augite andesite igneous rock specimens from Thirlmere, Cumbria, UK which are of late Ordovician age which form part of the Barrowdale volcanic group. The samples are of intermediate composition and contain phenocrysts of the pyroxene mineral, augite, giving the normally dark blue rock a black speckled appearance. The samples are available in 3 sizes and come supplied in a card tray with a label.
100 in stock
Specimens of bladed baryte from Derbyhire, UK. These specimens vary in colour from pale beige to white and display a bladed habit. These samples are supplied in a white card tray and are ideal for any collector of British material.
Specimens of white tabular baryte crystal beds from Cumbria, UK. Ideal for collectors of British mineral specimens. Samples are supplied a white car tray with an information label.
Specimens of calcite crystal beds of varying colours from Milldam Mine, Derbyshire, UK. These ideal specimens for collectors of British minerals are supplied in a white card tray with an information label.
Specimens of fluorite crystal beds from Fallgate Quarry, Ashover, Derbyshire, UK. Samples are available in multiple sizes and come supplied with an information label. Ideal samples for collectors of British fluorite specimens.