River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Category
Mineral Like Byproduct
Browse mineral like byproduct specimens identified by the Rock Identifier community.
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Spherulitic Agate / Moss Agate
Chalcedony (SiO2) with mineral inclusions
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Amygdoidal Basalt
Extrusive mafic igneous rock with mineral amygdules
igneous
Tumbled tiger’s eye chips
Tiger’s eye, chiefly quartz (SiO₂) with fibrous crocidolite-derived inclusions
mineral
Blue Quartz
Silicon Dioxide (SiO2)
mineral
Pegmatite
Granite Pegmatite
igneous
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Picture Jasper
Tectonically broken chalcedony (SiO2)
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Limonite
FeO(OH)·nH2O
mineral
Bauxite
Bauxite (principal ore of aluminum, primarily Al(OH)3)
sedimentary
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Bauxite (Laterite)
Hydrated aluminum oxides (Al2O3·nH2O)
sedimentary
Schist
Mica Schist
metamorphic
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Schist
Metamorphic Schist
metamorphic
Fire Agate
Silicon Dioxide (Chalcedony with Limonite inclusions), SiO2
gemstone
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Desert Rose
Gypsum (CaSO4·2H2O) or Barite (BaSO4)
mineral
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Bauxite
Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))
sedimentary
Greenschist
Metamorphic rock (chlorite, epidote, actinolite, albite)
metamorphic
Blue Quartz
Silicon Dioxide (SiO2) with microinclusions
mineral
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
sedimentary
Chert (Flint / Jasper / Hornstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Brimstone (Native Sulfur)
Native Sulfur (S)
mineral
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Quartz on Schist
Silicon Dioxide (SiO2) on Foliated Metamorphic Rock
metamorphic
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geode
mineral