Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Learn about Mineral And Sedimentary in the encyclopedia
View all →
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone Pebble
Arenite (SiO2 complex)
sedimentary
Gneiss
Gneiss
metamorphic
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Polished brown river pebble (likely chert or fine-grained sandstone)
Indeterminate; probable microcrystalline quartz (chert) or quartz-rich sandstone
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Ironstone concretion (possibly pyrite-bearing)
Iron-rich sedimentary concretion, likely composed of goethite/limonite with possible pyrite
sedimentary
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Red Jasper (or Banded Jasper)
Silicon Dioxide (SiO2 with Hematite impurities)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Limonite Geode / Ironstone Concretion
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Banded Sandstone (Zebra Stone)
Arenite with Iron Oxide Banding (Liesegang rings)
sedimentary
Worn River Pebble with Fossil Indentation
Sedimentary Rock with Fossil Infill
sedimentary
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Sandstone
Arenite (predominantly SiO2 with iron oxides)
sedimentary
Limonite
FeO(OH)·n(H2O)
mineral
Fossiliferous Shale
Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)
fossil
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Sandstone
Arenite (Sedimentary rock)
sedimentary
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Sandstone / Weathered Quartzite
Sandstone (Quartz Arenite)
sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Shale
Laminated Mudstone
sedimentary
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Chalcopyrite
CuFeS2
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion (Omar or Nut Rock)
Sedimentary Concretion (specifically an 'Omarolluk' or Omar)
sedimentary
Sphalerite
Zinc Sulfide (ZnS)
mineral
Unidentified pale yellow-green mineral/rock fragment
Possibly sulfur-bearing mineral, serpentine, or weathered limestone; exact identification requires testing
mineral
Pyrite
Iron sulfide (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary