Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Category
Anthropogenic Material (Man Made Rock)
Browse anthropogenic material (man made rock) specimens identified by the Rock Identifier community.
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Pumice
Vesicular volcanic glass (primarily SiO2)
igneous
Quartz Vein Outcrop
Silicon Dioxide (SiO2)
mineral
Chlorastrolite (Greenstone)
Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O
mineral
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone
Arenite (Secondary classification based on grain size)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Red Sandstone
Arenite (Fe2O3-rich)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
sedimentary
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Diorite
Diorite (an intrusive igneous rock)
igneous
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Serpentine
Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Graphic Granite
Pegmatitic Granite (Quartz and Microcline K-Feldspar mixture)
igneous
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)
Chert (Jasper)
Chert / Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pink Quartzite
Quartzite (primarily SiO2 with trace Fe2O3)
metamorphic
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Green Quartzite (with Fuchsite)
Quartzite with Muscovite variety Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Rose Quartz Carving
Quartum roseum (Variety of Quartz, SiO2)
Mineral
Sandstone (with vugs or solution cavities)
Arenite (primarily Quartz and Feldspar with CaCO3 or SiO2 cement)
sedimentary
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Tiffany Stone
Fluorite-bearing Opalized Breccia
Rock/Mineralized Nodule
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Chert (varieties include Flint and Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Pebble)
Microcrystalline to Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chert
Silicon dioxide (SiO2)
Sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary