Basalt with Quartz Veining
Veined Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine with quartz/calcite infill)
igneous
Category
Man Made (Synthetic Rock)
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Learn about Man Made (Synthetic Rock) in the encyclopedia
View all →
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
igneous
Basalt with Calcite Veins
Basalt (containing CaCO3 inclusions)
igneous
Sandstone (Micaceous)
Clastic Sedimentary Rock (primarily SiO2 with Mica)
sedimentary
Sandstone
Arenite (predominantly SiO2 quartz grains)
sedimentary
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Yellow Agate (Banded Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Quartzite with Feldspar and Mica (Granitic Gneiss Pebble)
Metamorphic Rock / Quartzite / Granitic Gneiss
metamorphic
Sandstone Pebble
Sandstone (Silicon dioxide-rich clastic sedimentary rock)
sedimentary
Quartzite Pebble (River Rock)
Metamorphic Quartzite (SiO2)
metamorphic
Vesicular Basalt (Scoria)
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Veined Quartzite / Vein-filled Sedimentary Rock
Siliciclastic rock with iron oxide-filled fractures
sedimentary
River Cobble (Weathered Granitoid)
Granodiorite / Quartz Diorite
igneous
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Basalt (Porphyritic Basalt)
Extrusive Igneous Rock
igneous
Dalmatian Stone
Aplite (often incorrectly called Dalmatian Jasper)
igneous
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Potassium Feldspar)
igneous
Granite fragment
Granite
igneous
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Basalt (Greenstone/Water-worn Pebble)
Basalt (containing Chlorite/Epidote)
igneous
Unakite
Epidotized Granite
metamorphic
Porphyritic Basalt (River Rock)
Porphyritic Basalt
igneous
Quartz Vein in Gneiss or Basalt
Milky Quartz (SiO2) within Metamorphic Host Rock
Metamorphic or Igneous with Mineral Inclusion
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
sedimentary
Basalt
Mafic extrusive igneous rock
igneous
Herkimer Diamond
Quartz (Silica - SiO2)
mineral
Shale
Shale (Fine-grained clastic sedimentary rock)
sedimentary
River Rocks (Black)
Various lithologies (e.g., basalt, chert, obsidian for black varieties), mechanically rounded clasts
Sedimentary
Coal
Coal (Sedimentary Rock / Organic Rock)
sedimentary
Vuggy Quartz on Matrix
Crystalline Silicon Dioxide (SiO2)
mineral
Weathered garnet-bearing gneiss
Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃
metamorphic
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Granite
Granite
Igneous
Quartz Vein in Matrix
Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix
igneous
Basalt Pebble
Extrusive Igneous Rock (Mafic)
igneous
Granite
Intrusive Igneous Rock
igneous
Shale with Quartz Veins
Fissile Sedimentary Rock (SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous