Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Category
Igneous Rock
Browse igneous rock specimens identified by the Rock Identifier community.
Ferruginous Sandstone (Gerrit)
Arenite with Iron Oxide cementation
sedimentary
Quartzite with Chlorite/Epidote
Metamorphosed Quartzite (SiO2)
metamorphic
Chert / Jasper
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Iron-stained Quartzite
Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)
metamorphic
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions
mineral
Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Geode (Unopened)
Silica-rich concretion (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
sedimentary
Quartzite Pebble
Recrystallized Quartz (SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Limonite inclusions
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Quartzite River Rock
Metamorphic Quartzite (primarily SiO2)
metamorphic
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
sedimentary
Sandstone (likely Graywacke or Arkosic varieties)
Arenite (composed primarily of SiO2)
sedimentary
Eclogite
Eclogite (Omphacite + Pyrope)
metamorphic
Sandstone (Ferruginous)
Arenite (complex silicate composition with iron oxides)
sedimentary
Quartz (Milky/Clear Variety)
Silicon Dioxide (SiO2)
mineral
Bauxite
Bauxite (principal ore of aluminum, primarily Al(OH)3)
sedimentary
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Banded Agate (specifically Lake Superior Agate)
Silicon dioxide (SiO2) - Cryptocrystalline Chalcedony
mineral
Unakite (Tumbled)
Epidotized Granite
metamorphic
Limonitic Quartzite
Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining
metamorphic
Unakite
Epidotized Granite
metamorphic