Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Chert / Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Arenite
Sandstone with Iron Oxide Coating
Arenite (SiO2 with Fe2O3 impurities)
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
Limonite (Ironstone Concretion)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Chert (Chalcedony-rich sedimentary rock)
Cryptocrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
Jasper
Microcrystalline Quartz (SiO2)
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Common Quartz Pebble/Rock)
Sedimentary rock / Quartz arenite
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly weathered chert or chalcedony
Sandstone (with Chert/Quartzite)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 variety)
Granite
Felsic intrusive igneous rock
Crushed Limestone
Calcium Carbonate (CaCO3)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Limestone Fragment
Sedimentary rock (primarily Calcium Carbonate, CaCO3)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Rough amber-like brown mineral specimen
Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
Blue Calcite
Calcium Carbonate (CaCO3)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Jasper
Silicon dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Yellow Jasper
Silicon dioxide (SiO2)
Geode (Unopened)
Silica-rich concretion (SiO2)
Jasper and Ironstone (likely Jasperized Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
Limestone
Sedimentary Calcite (CaCO3)
Stromatolite
Biogenic Sedimentary Rock (Lithified microbial mat)
Sandstone (Quartzose type)
Arenite (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)