Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Greenstone (possibly Basalt or Greenschist)
Greenschist (composed primarily of chlorite, actinolite, and epidote)
Metamorphic (low-grade)
Schist
Mica Schist
metamorphic
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Diamond (or Cubic Zirconia simulant)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
River Siltstone Pebble
Siltstone (primarily composed of silica and clay minerals)
sedimentary
Sandstone (Quartz Arenite)
Sandstone (Chemical formula: primarily SiO2)
sedimentary
Coquina
Coquina Limestone
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebbler
Quartzite (SiO2)
metamorphic
Wood Paneling
Engineered Wood / Plywood Paneling
not a rock
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Tan/Brown variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Tan/Yellow variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Hag Stone
Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes
sedimentary
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chalk (Sedimentary Limestone)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Greenschist
Greenschist (chlorite-epidote schist)
metamorphic
Serpentine, likely a variety of Chrysoprase (green chalcedony) or a similar translucent green mineral.
Serpentine Group Minerals (e.g., Antigorite, Lizardite) or Chalcedony (SiO2) with nickel impurities for Chrysoprase green.
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Limonite (Oxidized Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Ironstone with Limonite/Goethite coating
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)
sedimentary