Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Category
Anthropogenic (Human Made) Sedimentary Like Material
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Kyanite (Blue and Green varieties)
Kyanite (Al₂SiO₅)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz (specifically Milky or Clear Chunk)
Silicon Dioxide (SiO2)
mineral
Diorite (Salt and Pepper Rock)
Phaneritic plutonic igneous rock (sodium-rich plagioclase feldspar and hornblende)
igneous
Blue Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Mineral or Sedimentary Rock (with mineral inclusions)
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Quartz
Silicon dioxide (SiO2)
mineral
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt or Porphyritic Andesite
igneous
River Quartzite (River Rock)
Quartzite (SiO2)
metamorphic
Mookaite Jasper
Siliceous (chert) sedimentary rock, a form of Jasper
Sedimentary
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Blue Topaz (facetted in jewelry)
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Sandstone (Micaceous)
Arenite (primarily SiO2 with Phyllosilicates)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
Mineral / Sedimentary Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper
Silicon dioxide (SiO2) with iron impurities
sedimentary
Red Jasper (River Polished Quartzite)
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities
sedimentary
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Slate
Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)
metamorphic
Sandstone (Water-worn Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Dendritic Agate / Moss Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Mother of Pearl and Onyx
Aragonite (Mother of Pearl) and Chalcedony (Onyx)
mineral
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Red Jasper (beads)
SiO₂ (Silicon Dioxide)
Mineral, variety of chalcedony (microcrystalline quartz)