Basalt
Basalt (composition: Plagioclase, Pyroxene, and Olivine)
igneous
Category
Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)
Browse sedimentary rock (possibly a conglomerate or coarse grained sandstone) specimens identified by the Rock Identifier community.
Wishing Stone
Greenschist or Basalt with Quartz/Calcite Vein
metamorphic
Basalt River Stones
Aphantic Mafic Igneous Rock (Basalt)
igneous
Basalt (Weathered)
Extrusive Igneous Rock (Mafic composition)
igneous
Porphyritic Basalt
Basalt (with plagioclase phenocrysts)
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Basalt (Crushed Stone Aggregate)
Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt Pebble
Aphanitic mafic volcanic rock
igneous
Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Basalt
igneous
Quartzite River Stone
Quartzite (SiO2)
metamorphic
Dalmation Stone (Dyed)
Peralkaline rhyolite
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Black Jasper
Silicon Dioxide (SiO2) with Carbonaceous inclusions
sedimentary
Quartzite Pebbler
Quartzite (primarily SiO2)
metamorphic
Calamites Fossil (Horsetail Stem)
Calamites (Genus), part of the class Equisetopsida
sedimentary
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Basalt (Arrowhead form)
Extrusive mafic igneous rock
igneous
Quartzite (Ferruginous)
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
Igneous
Basalt (River Rock Cobble)
Extrusive mafic igneous rock
igneous
Red Quartzite
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Basalt
Extrusive mafic igneous rock
igneous
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
River Cobble (likely Quartzite)
Metamorphosed Sandstone (SiO2)
metamorphic
Basalt
Basalt
igneous
Quartzite with Iron Mineral Banding
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) staining
metamorphic
Basalt
Basalt (Mafic Extrusive)
igneous
Imperial Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions
Sedimentary
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Riverstone Quartzite / Chalcedony Nugget
Silicon Dioxide (SiO2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Basalt River Cobble
Basalt (Composition primarily Plagioclase Feldspar and Pyroxene)
igneous