Fossilized Gastropod Shell
Gastropoda (Class) replacement / internal cast (steinkern)
fossil
Category
Mineral On Sedimentary Rock
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Learn about Mineral On Sedimentary Rock in the encyclopedia
View all →
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Smooth river pebble (exact rock type indeterminate)
Unidentified rounded lithic clast; composition cannot be determined from the photograph
sedimentary
Travertine
Travertine (CaCO3)
sedimentary
Iron-rich rock or Concretion
Ironstone or Limonite concretion
sedimentary
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Sandstone Pebble
Sandstone (primarily Quartz, SiO2)
sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand grains
sedimentary
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Rounded pebble, likely fine-grained river stone
Unidentified lithic pebble; composition cannot be determined from the image
sedimentary
Sandstone
Clastic sedimentary rock (primarily Quartz)
sedimentary
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Sandstone pebble
Sandstone (siliciclastic sedimentary rock)
sedimentary
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Chert with Quartz Veining
Microcrystalline Silica (SiO2)
sedimentary
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Banded gneiss
Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing
metamorphic
Sandstone
Sandstone (principally SiO2/Silicon Dioxide)
sedimentary
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Small brown mineral fragment
Unidentified; the image lacks enough detail for a reliable species-level identification
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Sandstone Pebble
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Sandstone (with Iron Staining)
Arenite (Siliclastic sedimentary rock)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
River Pebble (Sandstone)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Sandstone
Clastic sedimentary rock (SiO2 primary)
sedimentary