Limestone with Quartz or Calcite Veining
Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions
sedimentary
Category
Sedimentary Rock (Altered)
Browse sedimentary rock (altered) specimens identified by the Rock Identifier community.
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Schist
Mica Schist
metamorphic
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Gneiss
Gneissic Metamorphic Rock
metamorphic
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
mineral
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
sedimentary (chemical/biological origin)
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian precursor)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Fossilized Favosites (Honeycomb Coral)
Favosites (extinct genus of tabulate coral)
sedimentary
Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Fossil Shell in Sedimentary Matrix
Bivalvia (fossil) in Calcium Carbonate Matrix
sedimentary
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Turquoise (set in silver jewelry)
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Geode (Unopened)
Siliceous Septarian Concretion / Geode (SiO2)
sedimentary
Quartz Vein in Siltstone
SiO2 (Quartz) on clastic sedimentary matrix
sedimentary
Geode (unopened)
Calcedony-lined Geode (SiO2)
sedimentary
Quartz-veined Schist (or Metasandstone)
Metamorphic Rock with Quartz Veining (SiO2)
metamorphic
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Sandstone Clast
Arenite (primarily SiO2)
sedimentary