Gneiss
Metamorphic Rock (Gneissic texture)
Category
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Gneiss
Metamorphic Rock (Gneissic texture)
Garnet Schist
Almandine-bearing Mica Schist
Picture Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
Red Sandstone
Arenite with iron oxide (Hematite) cement
Sandstone
Arenite (SiO2 based)
Granite
Intrusive Igneous Rock (Felsic)
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
Leopard Skin Jasper
SiO2 (Microcrystalline Quartz with inclusions)
Sandstone (likely Arkosic or Lithic Sandstone)
Sandstone (SiO2 predominant)
Jasper with Agate Inclusions
Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
Jasper (Banded Jasper / Chert)
Silicon Dioxide (SiO2 with iron oxide inclusions)
Red Sandstone
Arenite (Ferruginous Sandstone)
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Dalmatian Jasper
Peralkaline Quartz Feldspar Porphyry
Red Sandstone
Arenite (primarily Quartz with Iron Oxide)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg3Si2O5(OH)4)
Sandstone
Sandstone (principally SiO2/Silicon Dioxide)
Carnelian
Chalcedony (SiO2) with Iron Oxide inclusions
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 predominantly)
Quartz Crystal Geode / Druzy Cluster
Silicon Dioxide (SiO2)
Vesicular Basalt with Amygdules
Amygdaloidal Basalt
Tumbled Chalcedony
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
Milky Quartz with Chlorite inclusion
Silicon Dioxide (SiO2) with Chlorite group inclusions
Sandstone (with Quartz Vein/Inclusion)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Witch Stone (Hag Stone)
Perforated Sedimentary Rock (Typically Sandstone or Limestone)
Fossiliferous Limestone (Coquina)
Calcite (CaCO3) with Bioclastic inclusions
Sandstone
Arenite (SiO2 + various cementing minerals)
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
Basalt with Olivine Phenocrysts
Aphanitic Mafic Volcanic Rock (Basalt)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Granite Pebble
Intrusive Igneous Rock
Jasper
Silicon dioxide / Chalcedony (SiO2)