Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Quartz (beads)
SiO2 (Silicon Dioxide)
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (composed mainly of SiO2)
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
Sandstone
Clastic sedimentary rock (primarily SiO2)
Rough Diamond
Diamond (Pure Carbon: C)
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
Limestone (specifically a Crushed Aggregate fragment)
Calcium Carbonate (CaCO3)
Sandstone (lithic wacke/arenite)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (SiO2 primarily)
Orange Calcite
Calcite (CaCO3)
Diamond
Diamond (pure Carbon, C)
Quartz
Quartz (SiO₂)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Dolomite
Dolomite (CaMg(CO3)2)
Sandstone
Arenite (SiO2 based)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (River Pebble)
Arenite (primarily SiO2)
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Chert
Microcrystalline silica (SiO2)
Limestone (Weathered Aggregate)
Sedimentary Carbonate Rock (CaCO3)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (Siliclastic sedimentary rock)
Sandstone
Arenite (primarily SiO2)
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (Quartzite-rich River Cobble)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (SiO2 based)