Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Tektite (Indochinite)
Tektite (High-silica natural glass)
igneous
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Peridot
Olivine ((Mg,Fe)2SiO4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Olivine (often within Peridotite)
Magnesium iron silicate, (Mg,Fe)2SiO4
mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Iron Meteorite (Fragment)
Siderite (Iron-Nickel alloy: Kamacite and Taenite)
igneous
Chondrite Meteorite
Ordinary Chondrite (S-type asteroid origin)
igneous
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Iron Meteorite (likely Chondrite or weathered Iron-Nickel)
Meteorite (Fe-Ni alloy & silicates)
igneous
Tektite (Indochinite)
Tektite (Silica-rich natural glass)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
mineral
Iron Meteorite
Iron-nickel alloy (e.g., Kamacite, Taenite)
Meteorite (extraterrestrial material)
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Flower Agate
Chalcedony with Opaque Spherulitic Inclusions (SiO2)
Mineral
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
igneous
Scoria (with likely iron oxidation)
Scoria (Basaltic Scoria)
igneous
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Peridotite (Dunite)
Peridotite (mostly Olivine: (Mg,Fe)2SiO4)
igneous
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Mineral
Iron-Nickel Meteorite
Siderite (Meteoric Iron-Nickel alloy)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Slag Glass
Amorphous Silica / Glass Slag
industrial byproduct (anthropogenic rock-like material)
Chondrite Meteorite
Stony Meteorite (L, H, or LL Chondrite)
igneous
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Lunar Highlands Breccia (Meteorite)
Lunar Feldspathic Breccia
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Liesegang Banded Sandstone (Wonderstone)
Ferruginous Sandstone with Liesegang Rings
sedimentary
Epidote (or Epidote-rich rock)
Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).
Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Iron Meteorite
Siderite (Meteoric Iron-Nickel alloy)
igneous
Tektite (Indochinite)
Tektite (SiO2 + Al2O3, Glassy Melts)
igneous
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral