Sandstone
Clastic Sedimentary Rock
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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River Rock
Sedimentary Rock (various compositions)
sedimentary
Basalt
Mafic Igneous Rock (composed of plagioclase feldspar and pyroxene)
igneous
Granite
Intrusive Igneous Rock
igneous
River Siltstone Pebble
Siltstone (primarily composed of silica and clay minerals)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Weathered shale or mudstone fragment
Fine-grained clastic sedimentary rock, likely shale or mudstone; exact identification is uncertain from the photo
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Weathered quartzite pebble
Quartzite, composed predominantly of quartz (SiO₂)
metamorphic
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Quartz-bearing granite or pegmatite fragment
Likely granitic material composed mainly of quartz (SiO₂), feldspar, and possibly biotite or hornblende
igneous
Calcite
Calcite (CaCO3)
mineral
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Weathered gray sandstone or siltstone cobble
Clastic sedimentary rock, likely quartz-rich sandstone/siltstone (diagnosis uncertain from image)
sedimentary
Schist
Schist
Metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Weathered granite or granitic gneiss fragment
Quartz–feldspar–mica granite; possibly foliated granitic gneiss
igneous
Chert nodules in Limestone
Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix
sedimentary
Septarian Nodule
Septaria (composed of Calcite, Aragonite, and Limestone)
sedimentary
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Mineral
Sandstone (Ferruginous/Banded)
Clastic Terrigenous Sandstone (SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Red Sandstone
Clastic Sedimentary Rock
sedimentary
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Gneiss
Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Bauxite
Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))
sedimentary
Tumbled banded stone, likely sandstone or quartzite
Indeterminate; possibly quartz-rich sandstone (mostly SiO₂)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
sedimentary
Mixed Pebbles
Polylithic Rock Fragments
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Likely quartz-rich rock fragment
Quartz (SiO₂), possibly iron-stained or mixed with feldspar
mineral
Chert
Chert (variant of microcrystalline quartz)
Sedimentary
Malachite in Host Rock
Malachite - Cu2CO3(OH)2
mineral