Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
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Quartz Vein Outcrop
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Jasper with Cinnabar (Dragon Blood Jasper variant)
Silicon Dioxide with Mercury Sulfide (SiO2 + HgS)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Mineral
Porphyritic Basalt or Porphyritic Andesite
Porphyritic volcanic rock
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Breccia
Breccia - Clastic sedimentary rock
sedimentary
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Blue Quartzite (Dyed)
Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)
igneous
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Sandstone (Ferruginous)
Arenite (Fe2O3 staining)
sedimentary
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Sandstone
Arenite (primarily composed of SiO2 - Silicon Dioxide)
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz with Limonite inclusions
sedimentary