Pyrite
Iron Disulfide (FeS2)
Category
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Pyrite
Iron Disulfide (FeS2)
Basalt
Basalt (Aphanitic mafic volcanic rock)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Black Obsidian
Volcanic Glass (predominantly SiO2, Silicon Dioxide)
Jade
Jadeite or Nephrite
Diamond
Natural Carbon (C)
Tree Agate (or Moss Agate)
Dendritic Agate (Silicon Dioxide - SiO2)
Schist
Mica Schist
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Slate
Slate (Metamorphic Rock)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (Sedimentary Rock)
Greenschist
Greenschist (comprising Actinolite, Chlorite, and Epidote)
Slate
Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)
Chrysocolla
Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
Diamond
C (Carbon)
Amber
Succinite (fossilized resin)
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Chert (Green variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Lepidolite (in Quartz Matrix)
Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
Blue Quartzite
Quartzite with inclusions (SiO2)
Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
Scoria
Vesicular Basalt / Scoriaceous Basalt
Granite
Phaneritic Felsic Igneous Rock (Granite)
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Malachite
Copper(II) carbonate hydroxide [Cu2CO3(OH)2]
Red Jasper
Silicon dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Orange Calcite
Calcium Carbonate (CaCO3)
Rough Diamond
Diamond (pure Carbon, C)
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Jasper (Red/Brown Variety)
Jasper (Microcrystalline Quartz, SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Jasper with Quartz Vein
Silicon Dioxide (SiO2) with impurities
Jasper
Jasper (Silicon Dioxide, SiO2)
Rough Diamond
Diamond (Native Carbon), C
Garnet (specifically Almandine)
Almandine (Fe3Al2(SiO4)3)
Jasper (Green/Yellow Moss Jasper)
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese