Dalmatian Stone
Aplite (often incorrectly called Dalmatian Jasper)
igneous
Category
Sedimentary Rock (Metamorphosed)
Browse sedimentary rock (metamorphosed) specimens identified by the Rock Identifier community.
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Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Coal (Bituminous / Anthracite)
Organic Sedimentary Rock (Carbonaceous Rock)
sedimentary
Gravel / Crushed Stone
Aggregate (mixed mineral rock fragments)
sedimentary
Sandstone
Arenite
sedimentary
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Calcite
Calcite (CaCO₃)
Mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Sandstone (Pebble)
Arenite
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Cockle Shell Fossil
Cardiidae family (Bivalvia)
fossil
Cannonball Concretion
Calcite-cemented Sandstone Concretion
sedimentary
Fossil Brachiopod or Mollusk Cast
Phylum Brachiopoda / Mollusca internal mold
fossil
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Seashell Fossil
Gastropoda fossil
fossil
Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
sedimentary
Fossil bivalve or brachiopod in sedimentary rock
Unidentified fossil shell impression; likely a ribbed bivalve or brachiopod preserved in shale/siltstone
fossil
Clear Quartz (Cut/Faceted Gemstone)
Silicon Dioxide (SiO2)
gemstone
Shale
Shale (Consolidated fine-grained clay/silt)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or igneous host
sedimentary
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Amber-bearing Coal/Sedimentary Rock
Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (Weathered Fragment)
Clastic Sedimentary Rock
sedimentary
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Dalmation Jasper
Aplite with Arfvedsonite inclusions (SiO2 with Na3(Mg,Fe2+)4AlSi8O22(OH)2)
igneous
River Pebble (Siltstone / Fine Sandstone)
Sedimentary Rock (siliciclastic clastic rock)
sedimentary
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
sedimentary