Sandstone (Ferruginous)
Arenite (SiO2 with Iron Oxide impurities)
sedimentary
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
sedimentary
Jasper (likely Lake Superior Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary (silica-rich mineral variety)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Red Chert (Jasper)
Chert / Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Granite (with mafic xenolith)
Phaneritic Felsic Plutonic Rock
Igneous
Quartzite Pebble (with Iron Inclusions)
Metamorphic Rock (Mainly SiO2)
metamorphic
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sedimentary
Rhyolite
Rhyolite (felsic volcanic rock)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Diabase (Dolerite)
Mafic Intrusive Igneous Rock
igneous
Pink Quartzite
Silica (SiO2) - Metamorphic rock
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Red Granite
Felsic Intrusive Igneous Rock
igneous
Travertine
Terrestrial Sedimentary Rock (CaCO3)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Andesite Porphyry
Andesite (Intermediate Volcanic Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartzite pebble
Metamorphic rock (mainly SiO2)
metamorphic
Granite
Phaneritic Igneous Rock (Granite)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite Cobble
Granite (Felsic Plutonic Rock)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Basalt (Vesicular)
Extrusive Mafic Igneous Rock
igneous