Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Category
Synthetic Material (Not A Rock Or Mineral)
Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.
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Sandstone
Sandstone (Quartzose/Feldspathic Sandstone)
sedimentary
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Shale
Argillaceous Sedimentary Rock
sedimentary
Petrified Wood
Fossilized wood / Silicified wood
Sedimentary / Fossil
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Sandstone (with manganese staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Red Sandstone
Ferruginous Sandstone
sedimentary
Fossilized Shark Tooth
Chondrichthyes (class)
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (specifically sublithic or quartz arenite)
sedimentary
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Milky Quartz Geode / Chalcedony Nodule
Quartz (Silicon Dioxide - SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Quartz Vein on Matrix
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
mineral
Gabbro (or Basalt Pebble)
Mafic Intrusive/Extrusive Igneous Rock
igneous
Slate
Metamorphic Pelitic Rock
metamorphic
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Peridotite (Olivine Rock)
Peridotite (composed largely of olivine, (Mg, Fe)2SiO4)
igneous
Quartz Sand/Gravel
Silicon Dioxide (SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Siltstone (Yellow/Brown Sandstone or Siltstone)
Siltstone / Fine-grained Sandstone (rich in iron oxides like limonite)
sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Porphyry (Rhyolite or Andesite Porphyry)
Porphyritic Igneous Rock
igneous
Sandstone Flagstone
Arenite (SiO2 with various cementing agents)
sedimentary
Sandstone
Arenite
sedimentary
Granite
Phaneritic Igneous Rock (Granite)
igneous
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, Limestone)
sedimentary
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine
igneous