Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Red Jasper (Siltstone variant)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Eagle Eye / Grey Tiger Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Limonite Stained Basalt
Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)
igneous
Chert (Brown Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
River Rocks (Polished River Pebbles)
Stream-rounded clastic sediments
Mixed (Sedimentary, Igneous, and Metamorphic)
Quartz
Silicon Dioxide (SiO2)
Mineral
Chert (Flint nodules)
Chert (SiO2)
sedimentary
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)
mineral
Quartz with Mafic Inclusions
Silicon Dioxide (SiO2) with host igneous matrix
igneous
Chert (often called Jasper or River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Limestone (Pebble)
Calcium Carbonate (CaCO3)
sedimentary
Morganite and Aquamarine (Beryl) Bracelet
Beryllium aluminum silicate, Be3Al2(SiO3)6
gemstone
River Pebble (Greywacke or Quartzite-rich Sandstone)
Lithic Sandstone (primarily SiO2 with rock fragments)
sedimentary
Peridotite (Dunite)
Olivine-rich Peridotite ((Mg,Fe)2SiO4)
igneous
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Cubic Zirconia (Faceted)
Zirconium Dioxide (ZrO2)
mineral
Conglomerate
Conglomeratic Sandstone / Sedimentary Breccia
sedimentary
Mica Schist
Schist (primarily Muscovite and Biotite mica)
metamorphic
Magnetite (in matrix)
Magnetite (Fe3O4)
mineral
Taaffeite
BeMgAl4O8 (Beryllium Magnesium Aluminum Oxide)
mineral
Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Slag Glass
Silicon dioxide with impurities
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Chert (Quartzite-rich River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Granite or Pegmatite with Quartz and Feldspar
Granitoid
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Shungite
Shungite (carbon-rich Precambrian rock)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
metamorphic