Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Category
Non Geological
Browse non geological specimens identified by the Rock Identifier community.
Learn about Non Geological in the encyclopedia
View all →
Chert Conglomerate (Potomac Puddle Stone)
Sedimentary Conglomerate with Iron-Oxide matrix
sedimentary
Flint or chert nodule
Microcrystalline quartz (chalcedony), SiO₂
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Conglomerate
Pebble Conglomerate / Clastic Sedimentary Rock
sedimentary
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
sedimentary
Banded Sandstone / Quartzite with Mineral Veins
Sedimentary rock (Quartz arenite with iron oxide/silica banding)
sedimentary
Lake Superior Agate
Silicon Dioxide (Chalcedony / Quartz, SiO2)
sedimentary
Granite Pebble
Granite (felsic intrusive igneous rock)
igneous
Jasper Conglomerate
Clastic Sedimentary Rock (Conglomeratic Quartzite)
sedimentary
Quartz Geode (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Banded River Stone (Greywacke or Siltstone subtype)
Sedimentary Banded Siltstone
sedimentary
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
River Rock (likely Quartzite or Chert)
Quartzite (primarily SiO2)
metamorphic
Obsidian
Amorphous Volcanic Glass (primarily SiO2)
igneous
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone (Ferruginous)
Arenite (Iron-rich)
sedimentary
River Pebble (Quartz-rich)
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Basalt with Iron Oxide staining
Basalt (Mafic volcanic rock)
igneous
River Rock (Basalt/Greywacke)
Aphanitic Basalt or Lithic Sandstone (Greywacke)
igneous
Granite and Mixed Landscape Gravel
Plutonic Igneous Rock / Weathered Alluvium
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Basalt Pebble
Extrusive Igneous Rock
igneous
Beach Pebble (Quartz / Quartzite)
Silicon Dioxide (SiO2)
sedimentary
Granite
Granite (Plutonic Igneous Rock)
igneous
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3 with organic inclusions)
fossil
Mookaite Jasper
Radiolarite (Silicified radiolarian chert)
sedimentary
Desert Rose (Gelenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and organic impurities
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral