Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Chert (Arrowhead/Projectile Point)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Sandstone Pebble
Arenite (Siliclastic sedimentary rock)
sedimentary
Limestone with Iron Oxide Staining
Sedimentary Rock (Calcite, CaCO3)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Black-and-white bicolored pebble
Likely basalt with a pale felsic or carbonate coating/inclusion; exact identification requires testing
igneous
Sandstone
Arenite (Sandstone)
sedimentary
Iron-rich concretion or slag-like mineral fragment
Likely limonite/goethite (FeO(OH)·nH₂O), possibly magnetite-bearing material
mineral
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Iron-stained)
Chert (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Sandstone (Red Sandstone)
Arenite
sedimentary
Sandstone
Arenite (specifically Quartz Arenite)
sedimentary
Silver Nuggets (Natural or Cast)
Native Silver (Ag)
mineral
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Basalt
Mafic Igneous Rock (Basalt)
igneous
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Iron-rich vesicular rock, possibly slag or weathered basalt
Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
sedimentary
Basalt (Phaneritic or Diabase)
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Fossiliferous Limestone with Crinoid Stem fragment
Calcite (CaCO3) containing Crinoidea fossils
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Basalt (Vesicular/Scoria)
Vesicular Basalt
igneous
Dendritic jasper/chalcedony
Silica-rich microcrystalline quartz (SiO₂) with manganese-oxide dendrites
mineral