Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
sedimentary
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Pyrite
Iron Disulfide (FeS2)
mineral
Limestone (with possible Manganese oxide inclusions)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Glacial Granite with Epidote
Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
igneous
Limestone (specifically Iron-stained or Argillaceous Limestone)
Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities
sedimentary
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Chert (Iron-stained)
Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (iron-rich)
sedimentary
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) - variety Jasper
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Tree Agate
Silicon Dioxide (SiO2) - Dendritic Agate/Chalcedony
sedimentary
Limonite (Ironstone)
FeO(OH)·nH2O (Hydrous ferric oxides)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Native Copper in Basalt
Cuprum (with Host Basalt)
igneous
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Chert Nodule in Limestone
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Banded Agate (Lace Agate)
Agate (Variety of Cryptocrystalline Quartz), SiO2
mineral
Basalt with minor mineral crusting
Sideromelane / Extrusive Igneous Rock
igneous
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
mineral
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Ocean Jasper
Silicon dioxide with impurities (SiO2 + impurities)
sedimentary
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Pink Opal
Hydrated Silica (SiO2·nH2O)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Fancy Jasper
Silicon Dioxide (SiO2) with impurities
mineral
Prehnite
Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
River Pebbles (Mixed Lithology)
Conglomerate clasts (Silica-rich and Metamorphic assemblages)
sedimentary
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (with Iron Staining)
Arenite (SiO2 with Fe2O3/FeOOH impurities)
sedimentary