Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary
Category
Sedimentary (Imitation)
Browse sedimentary (imitation) specimens identified by the Rock Identifier community.
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Jade
There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.
Mineral
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Mineral (gemstone)
Larimar
Pectolite (a variety of pectolite, NaCa2Si3O8(OH))
Mineral
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Shale
Sedimentary Shale
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Shale
Argillaceous sedimentary rock
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Shale / Mudstone
Sedimentary rock (Claystone / Mudstone / Shale)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Conglomerate
Lithified, poorly sorted gravel; composition is uncertain from the image
sedimentary
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Slate
Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone or Mudstone
Sedimentary Rock
sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
sedimentary
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Magnetite or Ironstone Nodule
Magnetite (Fe3O4) or Hematite-rich Sedimentary Nodule
mineral
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Bivalve Shell Fragment (Biogenic Calcite/Aragonite)
Calcium carbonate (CaCO3, primarily aragonite/calcite)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Conglomerate (Quartz Pebble Conglomerate)
Quartz Pebble Conglomerate
sedimentary
Shale / Mudstone
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Fossil scallop shell
Scallop (family Pectinidae); shell composed chiefly of calcite and/or aragonite (CaCO₃)
fossil