Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Man Made Material (Constructed)
Browse man made material (constructed) specimens identified by the Rock Identifier community.
Chert (varieties include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Pink Granite
Phaneritic plutonic rock (dominated by Alkali Feldspar)
igneous
Sandstone
Sandstone (Clastic Sedimentary Rock)
Sedimentary Rock
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
Red Quartzite River Pebble
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Mookaite (Mookaite Jasper)
Silicified Radiolarite (SiO2 with iron oxides)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Fossil Coral (Petoskey Stone or Favosites)
Favosites (specifically Hexagonaria percarinata if silica-replaced Michigan type)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Pink Quartzite
Quartzite (primarily SiO2 with trace Fe2O3)
metamorphic
Unakite
Epidotized Granite
metamorphic
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Red Sandstone
Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Cloudy Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Cinnabar in Quartz
Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)
mineral
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
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
Sodalite
Sodalite (Sodium Aluminum Silicate Chloride) - Na8(Al6Si6O24)Cl2
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Grey Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic