Carnelian
Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)
Mineral
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Granite Cobble
Granite (Phaneritic Igneous Rock)
igneous
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Sandstone (likely Arkosic)
Arenite (SiO2 with KAlSi3O8)
sedimentary
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Laterite
Laterite (primarily composed of hydrated oxides of iron and aluminum)
Sedimentary Rock (as a residual soil/rock, it's often considered a type of sedimentary rock due to its formation from weathering, though it can cross into soil science)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Verde Antique Marble (Serpentinite)
Serpentinite (composed mainly of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Fe2O3
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Quartz Geode (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)
mineral
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Quartz (milky quartz variety)
Quartz (SiO₂)
Mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper
Jasper (Silica with Hematite impurities), SiO2
sedimentary
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining
mineral
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Grey Slate
Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)
metamorphic
Basalt
Basalt (a mafic extrusive igneous rock)
Igneous
Crushed Granite Gravel
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase Feldspar)
igneous
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock