Nuummite
Orthoamphibole (Anthophyllite-Gedrite composition)
metamorphic
Category
Man Made Material (Metal)
Browse man made material (metal) specimens identified by the Rock Identifier community.
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Stromatolite (Jasper-replaced)
Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Quartzite Chert Pebble
Microcrystalline Silicon Dioxide (SiO2)
sedimentary/metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Quartzite River Rock
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Mineraloid
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenic rock (composed mainly of SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Granitic Pebble (Glacial Erratic)
Granite
igneous
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite
sedimentary
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Granite Pebble
Granite (High-silica plutonic rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
White Quartz Cobble
Quartz (Silicon Dioxide, SiO2)
mineral
Black obsidian (probable)
Volcanic glass; primarily SiO₂-rich rhyolitic composition
igneous
Metallic sulfide ore, likely pyrite-bearing rock
Pyrite (FeS₂), possibly with chalcopyrite and quartz/host rock
mineral
Tumbled blue stone, likely sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue calcite or dyed material
mineral
White chalcedony or quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly with minor calcite or feldspar
mineral
Yellow-green jasper or serpentine-rich rock
Likely microcrystalline quartz (SiO₂) with iron-bearing and/or serpentine minerals; exact identification requires testing
mineral
Tumbled blue sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
mineral
Chert (often called Flint or Jasper based on color)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary