Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
Category
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Milky Quartz Cobble
Silicon Dioxide (SiO2)
Basalt
Basalt (extrusive igneous rock)
Bull Quartz
Quartz (Silicon Dioxide - SiO2)
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
Rose Quartz
Silicon dioxide (SiO2)
Flower Agate
Chalcedony (Silicon Dioxide, SiO2) with Opaque Spherulitic Inclusions
Rose Quartz
Quartz (Silicon Dioxide) - SiO2
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
Ironstone Concretion / Limonite
Goethite and Limonite (FeO(OH)·nH2O)
Chrysocolla in Quartz (Quantum Quattro variant)
Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2
Onyx Marble (Banded Calcite)
Calcite (Calcium Carbonate, CaCO3)
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
Septarian Nodule
Septarian Concretion (Calcium Carbonate/Aragonite/Calcite)
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
Kimberlite with Diamond
Kimberlite (Porphyritic Peridotite)
Pink Granite
Phaneritic plutonic rock (dominated by Alkali Feldspar)
Diorite (Polished Cobble)
Diorite (Intermediate intrusive igneous rock)
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
Quartzite
Quartzite (SiO2)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Diorite (Salt and Pepper Rock)
Diorite
Diorite
Diorite (Intermediate intrusive igneous rock)
Amygdaloidal Basalt
Amygdaloidal Basalt
Diorite
Diorite (Intermediate intrusive igneous rock)
Granite Cobble
Granite
Granite
Granitoid
Conglomerate
Conglomerate (a clastic sedimentary rock)
Basalt with Iron Oxidation
Mafic Igneous Basalt
Diorite
Phaneritic Intermediate Igneous Rock
Red Granite
Phaneritic Felsic Igneous Rock
Diorite
Intermediate plutonic igneous rock
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
Green Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
Ironstone Concretion (Moqui Marble type)
Iron oxide concretion (Goethite/Hematite and Sandstone)
Barite Rose on Marcasite
Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
Mica Schist
Mica Schist (Predominantly Muscovite/Biotite)
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
Banded Gneiss (River Cobble)
Gneiss (High-grade regional metamorphic rock)
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz