Olivine (Peridot when gem-quality)
Magnesium Iron Silicate, (Mg,Fe)2SiO4
Mineral
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Technogenic) in the encyclopedia
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Limonite
FeO(OH)•nH2O
mineral
Diorite (or Gabbro/Gneiss stream pebble)
Diorite
igneous
Sandstone
Arenite (SiO2 variety)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite / Goethite, FeO(OH)·nH2O)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Orange Quartz / Peach Aventurine
Silicon Dioxide (SiO2)
mineral
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Ferruginous Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Yellow Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth
Carcharocles sp. or similar (Fossilized Fluorapatite)
sedimentary
Quartz crystal with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite (predominantly SiO2)
sedimentary
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Chromite
Chromite (FeCr2O4)
mineral
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Aventurine
Quartz (Silicon Dioxide - SiO2) with inclusions of Mica
Mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Eudialyte in Matrix
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Shale
Argillaceous sedimentary rock
sedimentary
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Quartzite
Quartzite (primarily SiO2 with chromium-rich mica/fuchsite impurities)
metamorphic
Limonite-stained Granite
Felsic Plutonic Rock with Hydrated Iron Oxides
igneous
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
metamorphic
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary