Fossiliferous Limestone (Red Marble)
Bioclastic Limestone (CaCO3)
sedimentary
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite
sedimentary
Ammonite Fossil (Polished Half)
Ammonoidea (subclass)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Banded Jasper (Chert)
Silicon Dioxide (SiO2) - variety of Chalcedony
Sedimentary Rock
Leopard Skin Jasper
Chalcedony (cryptocrystalline Quartz)
Mineral
Pyrite with Iron Oxides (Fool's Gold in Matrix)
Iron Sulfide (FeS2)
mineral
Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Specular Hematite
Iron Oxide (Fe2O3)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Shungite
Shungite (carbon-rich Precambrian mineraloid)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Rhodolite Garnet
Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3
mineral
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Kyanite (Blue and Green varieties)
Kyanite (Al₂SiO₅)
mineral
Zebra Jasper
Jasper (variety of Quartz/Chalcedony), SiO2
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Beach Pebble (Chert/Quartzite)
Microcrystalline Quartz (SiO2)
sedimentary
Dragon Blood Jasper
Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))
sedimentary
Anthracite
Anthracite Coal (C)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Anthracite
Anthracite Coal
sedimentary
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral