Shale
Shale (Consolidated fine-grained clay/silt)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Shale
Shale (Consolidated fine-grained clay/silt)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 major component)
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
Sandstone Cobble
Arenite (Secondary classification based on grain size)
Feldspar
Potassium Feldspar (KAlSi3O8)
Shale
Shale (comprised mostly of clay minerals and quartz)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Quartzite Pebble
Quartzite (principally SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
Note regarding image quality
Basalt
Mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)
Pink Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
Granodiorite
Granodiorite (intermediate intrusive igneous rock)
Lava Stone and Chakra Beads
Basalt (with various mineral/synthetic beads)
Basalt River Stone (Tumbled)
Basalt (Mafic Extrusive Igneous Rock)
Basalt with vesicles (Amygdaloidal Basalt)
Amygdaloidal Basalt (predominantly Plagioclase and Pyroxene)
Basalt (with Plagioclase Phenocrysts)
Porphyritic Basalt
Pink Granite
Phaneritic intrusive igneous rock (K-feldspar rich)
Granite with Orthoclase and Hematite Staining
Phaneritic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
Basalt
Basalt (Mafic Aphanitic Igneous Rock)
Basalt with Quartz/Calcite Vein
Basalt (Mafic Volcanic Rock with secondary mineralization)
Basalt
Basalt (principally composed of pyroxene and plagioclase feldspar)
Granite Cobble
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
Basalt with Scoria/Vesicular Texture
Vesicular Basalt (Iron-rich/Oxidized)
Basalt (River Pebble)
Mafic volcanic rock (primarily Plagioclase feldspar and Pyroxene)
Basalt (River Cobble)
Mafic Igneous Basalt (composed primarily of Plagioclase feldspar, Pyroxene, and Olivine)
Basalt (with possible quartz veinsing)
Basalt
Conglomerate
Conglomerate (clastic sedimentary rock)
Quartzite
Quartzite (primarily SiO2)
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Chert (Gravel Bit)
Microcrystalline silica (SiO2)
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Gossan with Copper Carbonate (Chrysocolla/Malachite)
Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Granite River Pebble
Phaneritic Felsic Igneous Rock (Granite)
Green Banded Agate
Agate (Variety of Chalcedony/Quartz), SiO2
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)