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Sedimentary Rock Specimens






Sedimentary rocks are formed at or near the surface of the earth. Most of these sediments are deposited in beds or layers by water or wind as a result of weathering (erosion). Sedimentary rocks can be classified by their mode of origin as clastic, chemical or organic.

Clastic sedimentary rocks like sandstone are composed of rock fragments or mineral grains broken from any type of pre-existing rock. Chemical sedimentary rocks like gypsum result from precipitation of dissolved materials in fresh or salt water. Organic sedimentary rocks like coal form from accumulation plant or animal debris.

Rockman's sedimentary rock specimens are hand broken as opposed to being crushed which helps keep cleavage and fracture characteristics intact. If you are looking for a specimen that is not listed, please contact us, we may have it in stock or we may be able to locate it.


We offers the 3 standard sizes of sedimentary rocks as illustrated:

small hand

Small - 0.75" to 1.2"
10 pieces in resealable bag.
large hand

Large - 2" x 3" up to 3" x 4"
ONE (1) boxed piece.
medium hand

Medium - 1.25" to 1.75"
10 pieces in resealable bag.

Argillite (red to brown)

  • 10 Pack - Small [RS005b]
  • 10 Pack - Medium [RS005c]
  • 1 Large Sample [RS005d]
Item Number
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Arkose (red, coarse-grained)

  • 10 Pack - Small [RS010b]
  • 10 Pack - Medium [RS010c]
  • 1 Large Sample [RS010d]
Item Number
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Breccia (angular fragments cemented together)

  • 10 Pack - Small [RS031b]
  • 10 Pack - Medium [RS031c]
  • 1 Large Sample [RS031d]
Item Number
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Bituminous Coal

  • 10 Pack - Small [RS030b]
  • 10 Pack - Medium [RS030c]
  • 1 Large Sample [RS030d]
Item Number
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Lignite Coal (soft, crumbly)

  • 10 Pack - Small [RS035b]
  • 10 Pack - Medium [RS035c]
  • 1 Large Sample [RS035d]
Item Number
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Conglomerate (mixed pebbles)

  • 10 Pack - Small [RS050b]
  • 10 Pack - Medium [RS050c]
  • 1 Large Sample [RS050d]
Item Number
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Dolomite Rock - Dolostone (light to pinkish, can be somewhat granular)

  • 10 Pack - Small [RS060b]
  • 10 Pack - Medium [RS060c]
  • 1 Large Sample [RS060d]
Item Number
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Greywacke (limited supply)

  • 8 Pack - Small [RS073b]
Item Number
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Loess (fine wind-blown glacial sediments)

  • 1 Large Sample [RS075d]
Item Number
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Limestone - Compact (fine-grained)

  • 10 Pack - Small [RS080b]
  • 10 Pack - Medium [RS080c]
  • 1 Large Sample [RS080d]
Item Number
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Limestone - Chalk

  • 10 Pack - Small [RS081b]
  • 10 Pack - Medium [RS081c]
  • 1 Large Sample [RS081d]
Item Number
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Limestone - Coquina

  • 10 Pack - Small [RS082b]
  • 10 Pack - Medium [RS082c]
  • 1 Large Sample [RS082d]
Item Number
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Limestone - Fossiliferous

  • 10 Pack - Small [RS083b]
  • 10 Pack - Medium [RS083c]
  • 1 Large Sample [RS083d]
Item Number
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Limestone - Oolitic (small ooids visable)

  • 10 Pack - Small [RS085b]
  • 10 Pack - Medium [RS085c]
  • 1 Large Sample [RS085d]
Item Number
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Phosphorite (contains high amounts of phosphate)

  • 10 Pack - Small [RS090b]
  • 10 Pack - Medium [RS090c]
Item Number
paypal


Rock Salt - Halite (white to red granular)

  • 10 Pack - Small [RS100b]
  • 10 Pack - Medium [RS100c]
  • 1 Large Sample [RS100d]
Item Number
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Sandstone - Banded (light red, with visible layering)

  • 10 Pack - Small [RS120b]
  • 10 Pack - Medium [RS120c]
  • 1 Large Sample [RS120d]
Item Number
paypal


Sandstone - Yellow (gritty)

  • 10 Pack - Small [RS110b]
  • 10 Pack - Medium [RS110c]
  • 1 Large Sample [RS110d]
Item Number
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Sandstone - Red (fine-grained)

  • 10 Pack - Small [RS115b]
  • 10 Pack - Medium [RS115c]
  • 1 Large Sample [RS115d]
Item Number
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Sandstone - Gray to White (siliceous, gritty)

  • 10 Pack - Small [RS125b]
  • 10 Pack - Medium [RS125c]
  • 1 Large Sample [RS125d]
Item Number
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Shale - Bituminous (black, thin sheets)

  • 10 Pack - Small [RS127b]
  • 10 Pack - Medium [RS127c]
  • 1 Large Sample [RS127d]
Item Number
paypal


Shale - Carbonaceous (black to dark gray, may contain fern fragments)

  • 10 Pack - Small [RS128b]
  • 10 Pack - Medium [RS128c]
Item Number
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Shale - Gray

  • 10 Pack - Small [RS129b]
  • 10 Pack - Medium [RS129c]
  • 1 Large Sample [RS129d]
Item Number
paypal


Shale - Red (argillaceous)

  • 10 Pack - Small [RS130b]
  • 10 Pack - Medium [RS130c]
  • 1 Large Sample [RS130d]
Item Number
paypal


Shale - Tan/Buff

  • 10 Pack - Small [RS132b]
  • 10 Pack - Medium [RS132c]
  • 1 Large Sample [RS132d]
Item Number
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Oil Shale (brown, trapped oil)

  • 10 Pack - Small [RS135b]
  • 10 Pack - Medium [RS135c]
  • 1 Large Sample [RS135d]
Item Number
paypal


Siltstone (tan or gray)

  • 10 Pack - Small [RS140b]
  • 10 Pack - Medium [RS140c]
  • 1 Large Sample [RS140d]
Item Number
paypal


Tufa (calcium carbonate precipitate, a more porous type of travertine)

  • 10 Pack - Small [RS141b]
  • 10 Pack - Medium [RS141c]
  • 1 Large Sample [RS141d]
Item Number
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Travertine (calcium carbonate precipitate)

  • 10 Pack - Small [RS142b]
  • 10 Pack - Medium [RS142c]
  • 1 Large Sample [RS142d]
Item Number
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