Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
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.
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Fluorite
Calcium fluoride (CaF2)
mineral
Iron Meteorite
Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)
mineral
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Sandstone (Banded)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Peridot (Olivine)
Olivine (Magnesium Iron Silicate), (Mg,Fe)2SiO4
mineral
![Blue Quartz (Dumortierite Quartz) (SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]) — metamorphic](https://media.rock.id/blue-quartz-dumortierite-quartz-72e42d24-fbdb-4e3d-bc4b-9cfae9e59260-thumbnail.jpg)
Blue Quartz (Dumortierite Quartz)
SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]
metamorphic
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
mineral
Concretion
Septarian concretion (likely containing Calcite or Siderite)
sedimentary
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Chert Concretion
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Possible iron-rich basalt or industrial slag
Basalt, likely Fe–Mg silicate rock; exact identification is uncertain from the blurred image
igneous
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
mineral
Sandstone with Liesegang Rings
Clastic Sedimentary Rock with Iron Oxide Precipitates (SiO2 + Fe2O3)
sedimentary
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Green Aventurine
Silicon dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H Group)
igneous
Olivine (Peridot)
(Mg,Fe)2SiO4
mineral
Slag Glass
Amorphous Silica / Glass Slag
industrial byproduct (anthropogenic rock-like material)
Olivine (often within Peridotite)
Magnesium iron silicate, (Mg,Fe)2SiO4
mineral
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H type)
igneous
Sandstone (Wonderstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Iron Meteorite
Meteoritic Iron (Fe-Ni alloy)
meteorite
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Flower Agate
Chalcedony with Opaque Spherulitic Inclusions (SiO2)
Mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Vesicular Basalt (Scoria)
Aphanitic Mafic Igneous Rock with Vesicular Texture
igneous
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Dendritic Siltstone
Siltstone with Manganese Oxide dendrites (MnO2)
sedimentary
Lunar Meteorite (Feldspathic Breccia)
Achondrite, Lunar Meteorite (Feldspathic Breccia)
igneous