Amygdaloidal Basalt
Basalt with secondary mineral infilling (SiO2/CO3)
Category
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Amygdaloidal Basalt
Basalt with secondary mineral infilling (SiO2/CO3)
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)3O8
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
Epidote-bearing Rock / Epidote Inclusion
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
Basalt
Basalt
Quartz Druze
Silicon Dioxide (SiO2)
Turquoise or Chrysocolla (Inlaid Jewelry)
Hydrated copper aluminum phosphate / Hydrated copper phyllosilicate
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Diorite
Diorite (plutonic igneous rock)
Botryoidal Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Gneiss
Gneiss (High-grade metamorphic rock)
Vesicular Basalt (commonly mistaken for Slag)
Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)
Chrysocolla
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
Pyrite
Iron Sulfide (FeS2)
Strawberry Quartz
Quartz (SiO2) with inclusions of Goethite or Hematite
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Black Obsidian with white veins
Volcanic Glass (70–75% SiO2)
Tourmalinated Quartz
Silicon Dioxide with Tourmaline inclusions (SiO2 + Na(Fe3Al6)(Al5Si6O18)(BO33)(OH4))
Sandstone
Arenite (SiO2 based)
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
Quartz / Iron-Stained Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions/staining
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
Dendritic Siltstone
Siltstone with Manganese Oxide dendrites (MnO2)
Diorite
Diorite (intermediate plutonic rock)
Clear Quartz
Silicon dioxide (SiO2)
Obsidian (in jewelry setting)
Volcanic Glass (Amorphous Silica)
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
Fluorite
Calcium Fluoride (CaF2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
Gneiss
Gneiss
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Olivine (Peridot)
(Mg,Fe)2SiO4
Amygdaloidal Basalt with Epidote
Vesicular Basalt with secondary Epidote/Quartz mineral infill
Sandstone
Clastic Sedimentary Rock
Mica Schist
Mica Schist (Quartz-Biotite-Muscovite Schist)
Brown Garnet
Andradite or Almandine Garnet (general formula X3Y2(SiO4)3)
Sandstone
Arenite
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Quartz (Milky / Clear Quartz Fragment)
Silicon Dioxide (SiO2)