Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Category
Not A Rock Or Mineral (Anthropogenic Material)
Browse not a rock or mineral (anthropogenic material) specimens identified by the Rock Identifier community.
Ferruginous Sandstone Pebble
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Granite
Granite
igneous
Siltstone with Quartz Vein
Siltstone (primarily SiO2, Al2O3, Fe2O3)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)
sedimentary
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
sedimentary
Red Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Diorite (Polished Tumble)
Diorite (Intermediate intrusive igneous rock)
Igneous
Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Quartz Crystal Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Sandstone
Arenite (primarily SiO2, silica)
sedimentary
Granite
Phaneritic Acidic Igneous Rock (Granite)
igneous
Granite Cobble
Plutonic Igneous Rock (Granitic)
igneous
Botryoidal Malachite
Malachite - Cu2CO3(OH)2
mineral
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Herkimer Diamond
Quartz (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Granodiorite
Granodiorite (Na,Ca)(Si,Al)4O8
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)
igneous
Greenschist
Greenschist facies rock
Metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Porphyritic Rhyolite (Birdseye Rhyolite)
Rhyolite (Porphyritic texture)
igneous
Ferruginous Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Granite
Phaneritic plutonic rock (SiO2 typically >69%)
igneous
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary