Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Chert (often called Flint in various colors)
Silicon Dioxide (SiO2)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
igneous
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Red Jasper
Jasper (a variety of Quartz, SiO2)
Mineral
Amethyst (Faceted)
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Fossiliferous Chert (with Brachiopod or Mollusk fragments)
Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions
sedimentary
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicified sedimentary or volcanic rock (primarily SiO2)
sedimentary
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Ironstone with Limonite/Goethite coating
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)
sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Green Jasper with Quartz veins
Jasper (Silicon Dioxide, SiO2)
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Basalt
Basalt
Igneous
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
sedimentary
Granite
Felsic Intrusive Igneous Rock
igneous
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Dyed Purple Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Banded Calcite (Tumbled)
Calcium Carbonate (CaCO3)
Mineral
Quartzite (Yellow/Tan)
Metamorphic Rock composed of Quartz (SiO₂)
metamorphic
Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Gastropod Steinkern (Fossil Snail Internal Mold)
Class Gastropoda (Internal Mold)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Garden Quartz (Lodalite)
Silicon Dioxide with various mineral inclusions (SiO2)
mineral
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Chert / Pink Chert
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic