Diamond
Diamond (C)
Mineral
Category
Man Made Material (Anthro Lithic Product)
Browse man made material (anthro lithic product) specimens identified by the Rock Identifier community.
Limestone (specifically Travertine or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Iron Meteorite
Iron Meteorite (primarily Kamacite and Taenite, Fe-Ni alloys)
mineral
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Basalt with Quartz/Feldspar Inclusions
Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining
igneous
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2 with minor Fe2O3)
sedimentary
Quartz
Quartz (SiO2)
Mineral
Blue Sphalerite (likely dyed or treated Druzy Quartz/Agate)
Zinc Sulfide (ZnS) or Silicon Dioxide (SiO2) with trade-name enhancement
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Anthropogenic / Non-mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Cockle Shell (Fossil or Recent)
Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)
Sedimentary (Biogenic, a type of fossil)
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Red)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Iron Slag
Anthropogenic Iron Silicate
industrial byproduct
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Quartz (likely macrocrystalline variety)
Quartz (SiO₂)
Mineral
Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Chert (Agate/Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chert (specifically Flint or Dark Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz (Small fragments)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
igneous
Rose Quartz with Schist Matrix
Silicon Dioxide (SiO2) with Mica-Schist
mineral
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Quartz
Quartz (SiO₂)
Mineral
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Basalt (Arrowhead form)
Extrusive mafic igneous rock
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral