Sandstone
Arenite
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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Ruby (set in a ring; possibly synthetic or imitation)
Corundum, Al₂O₃; red color is typically caused by chromium
gemstone
Generic Pebble / Small Rock Fragment
Lithic fragment / Weathered rock particle
sedimentary
Polished green banded stone, likely serpentine or altered greenstone
Probable serpentinite/greenstone; commonly dominated by serpentine-group minerals, chlorite, epidote, or actinolite
metamorphic
Likely pink granite
Granite, a coarse-grained felsic intrusive igneous rock, typically quartz + feldspar + mica
igneous
Quartz Geode
Silicon dioxide (SiO2)
sedimentary
Geode (Unopened)
Siliceous Geode (SiO2)
sedimentary
Small dark rock, possibly basalt or a weathered pebble
Unidentified specimen; basalt is a possible visual match, but the image lacks diagnostic detail
igneous
Diamond (Faceted)
Diamond (Carbon, C)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Breccia
Sedimentary Breccia
sedimentary
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Crushed Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Black-and-white patterned stone, possibly zebra marble
Uncertain from the image; likely calcite marble with dark mineral veining or inclusions
metamorphic
Sandstone (Greywacke)
Arenite / Wacke (Mainly SiO2 with various lithic fragments)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Moldavite
Tektite (Natural Silicate Glass)
gemstone
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Possible green tourmaline (small rough crystal fragment)
Possibly elbaite, Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₄; identification is uncertain from the blurry image
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone
Sandstone (Clastic Sedimentary Rock)
Sedimentary Rock
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Diamond
Diamond (Pure Carbon, C)
Mineral
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Weathered iron-rich rock, possibly laterite or ironstone
Goethite–hematite-rich ferruginous rock; uncertain without testing
sedimentary
Conglomerate
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Graphite
Graphite (C)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Polymictic conglomerate (possibly impact breccia)
Lithified polymictic conglomerate/breccia; clasts appear mainly mafic volcanic rock, with quartz- or feldspar-rich fragments in a dark matrix
sedimentary
Rough Quartz (Milky / Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral