Petrified Wood
Silicified Wood (SiO2)
metamorphic
Category
Mineral (Man Modified)
Browse mineral (man modified) specimens identified by the Rock Identifier community.
Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
sedimentary
Basalt
Vesicular Basalt (Mafic volcanic rock)
Igneous
Amethyst
Silicon Dioxide (SiO2) with traces of Iron and Manganese
mineral
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
igneous
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Diamond (Rough)
Diamond (Carbon, C)
Mineral
Bauxite Ore
Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)
Mineral
Rose Quartz Carving
Quartum roseum (Variety of Quartz, SiO2)
Mineral
Peridot
Olivine (specifically, the gem-quality variety forsterite, (Mg,Fe)2SiO4)
Mineral
Dendritic Agate
Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)
mineral
Rose Quartz (likely carved)
Rose Quartz (SiO2)
Mineral
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Moss Agate
SiO2 (Silicon Dioxide) with dendritic inclusions
Mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
Mineral
Diamond
Carbon (C)
Mineral
Chakra Stone Bracelet (mixed gemstones)
Multi-mineral/Gemstone assembly (primarily Quartz variety beads)
mineral
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
not a rock or mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Granite
Granite (a felsic intrusive igneous rock)
Igneous rock
Quartzite (specifically an iron-stained or Carnelian-colored variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Quartzite Cobble
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Basalt
Extrusive Mafic Igneous Rock
igneous
Obsidian
Obsidian (Extrusive Volcanic Glass)
igneous
Granite Cobble
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
igneous
Sandstone with Bedding Planes
Arenite (Sedimentary rock composed primarily of sand-sized minerals)
sedimentary
Slag (Industrial Glass)
Artificial Vitreous Silicate
mineraloid (anthropogenic)
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
mineral
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Mineral
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Mineral
Scoria (Vesicular Basalt)
Vesicular Basalt
igneous
Kyanite
Kyanite (Al2SiO5)
Mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral