Likely weathered sandstone or iron-rich volcanic rock
Indeterminate from photograph; probable ferruginous sandstone, possibly altered volcanic rock
sedimentary
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Unidentified rough mineral/rock fragment
Indeterminate from image; possibly quartz-rich material or weathered carbonate rock
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
sedimentary
Citrine
Silicon Dioxide (SiO₂)
mineral
Sandstone Concretion
Sandstone (Sedimentary rock, mostly SiO2)
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
fossil
Halite (Rock Salt)
Halite (NaCl)
mineral
Sandstone (Tumbled / Rounded)
Sedimentary Rock (Quartz arenite)
sedimentary
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Sandstone (Pebble)
Arenite
sedimentary
Tumbled agate or chalcedony
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pitted Sedimentary Rock / Cupstone
Sedimentary rock with weathering pit (arenite / sandstone)
sedimentary
Pink faceted gemstone, possibly pink sapphire
Uncertain from the image; possibly corundum (Al₂O₃)
gemstone
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Fluorite (Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Rose quartz (rough)
Quartz, SiO₂; trigonal crystal system
mineral
Diamond (Heart Cut)
Carbon (C)
gemstone
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Sandstone (Quartzose)
Arenite (composed mainly of SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone
K2 Jasper (K2 Granite)
Azurite-in-Granite
igneous
Gravel
Unconsolidated rock fragments / detrital sediment
sedimentary
Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Geodic habit
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Vesicular Basalt (Iron Scoria)
Aphanitic Mafic Igneous Rock with Vesicular Texture
igneous
Banded Sedimentary Rock
Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands
sedimentary