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Dolomite or Dolostone is a carbonate rock composed primarily of the mineral Dolomite.
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Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. Most dolostones formed as a magnesium replacement of limestone or lime mud prior to lithification. It is resistant to erosion & less soluble than limestone in weakly acidic groundwater. Technically, dolostone has a stoichiometric ratio (reaction & product ratio) of nearly equal amounts of magnesium and calcium. This particular example comes from the Clitheroe area of Lancashire. Specimens are supplied in labelled card trays.
Weight | 120 g |
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Specimen Size | 2" x 2", 3" x 2" |
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Carboniferous ( Dinantian ) Limestone from the White Peak area of Derbyshire.
100 in stock
Dolomite microscope slide with extreme birefringence in XPL and varied relief in PPL. Excellent to observe the nature of the minerals and interpret the history of the rock. The glass slide is 46 x 27 mm in size, suitable for enthusiasts, educational use and more, it will come in card sleeve with a label.
6 in stock
Lower Carboniferous crinoidal limestone from Derbyshire, U.K.
296 in stock
Oolitic limestone from the middle Jurassic of Gloucestershire. Traditional building stone throughout the Cotswolds. Available in a range of sizes.
300 in stock
Dolomite crystal beds, pink in colour form Morocco, the presence of manganese results in a pale pink hue, these mineral specimens also have larger crystals than the UK material and are higher quality. Available in various optional sizes, supplied in tray with a data label.
50 in stock
Millstone Grit. A coarse grained Carboniferous (Namurian) sandstone from the North of England.
90 in stock
Purbeck limestone (also known as Purbeck marble) is a fossiliferous carbonate rock found on the Isle of Purbeck in Dorset. UK. Upper Jurassic to Lower Cretaceous in age. Available in a variety of sizes.
198 in stock
Peat (recent) collected on the moorlands of Lancashire. Supplied in a labelled card tray.
Out of 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
Carboniferous Mudstone found in Lancashire supplied in a card tray with a label.
300 in stock
Dark grey Shale from the Jurassic of the Yorkshire coast. Originally deposited in a deep water marine environment. Occasionally fossiliferous.
190 in stock
Another variation of shelly limestone. This specimen also includes oolites along with fossil shell fragments. The specimens are a pale cream colour and available in card trays with a label.
50 in stock
Shelly limestone containing numerous fossil of Carboniferous age, including bivalves , corals, crinoids & brachiopods. These specimens were collected in Gloucestershire, Uk. They are available in a variety of sizes.
Travertine is a form of limestone which has been precipitated from carbonate rich hot springs. These examples are from Yorkshire, UK and are supplied in a labelled card tray.
38 in stock
This is a rare & unusual rock, part of the highly studied Zechstein Formation. It is a concretionary Magnesium Limestone of Permian age, supplied in a 1.5″ x 1.5″ magnification box.
13 in stock
Lignite or Brown Coal is a naturally compressed peat deposit. Lower grade than traditional coals & younger in age, in this case from the Miocene in Germany.
93 in stock
Conglomerate with well rounded clasts from Faringdon, UK. A good example of the lithotype as opposed to a Breccia which would contain predominantly angular to sub-angular clasts.
200 in stock
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