Rough Diamond
Diamond (pure carbon, C)
mineral
Category
Man Made Material
Browse man made material specimens identified by the Rock Identifier community.
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement, Fe2O3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Moss Agate
Chalcedony (Silicon Dioxide - SiO2) with inclusions
Mineral
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Sandstone
Arenite
sedimentary
Rough Diamond
Diamond (C)
mineral
Diamond (or Diamond Simulant)
Carbon (C) - Native Element
mineral
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Green variety)
Silicon Dioxide (SiO2)
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond
C (Carbon)
mineral
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Mineral
Diamond
Carbon (C)
mineral
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
sedimentary
Diamond
Native Carbon (C)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
igneous
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Diamond
C (Carbon)
mineral
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)
sedimentary