Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
Category
Browse sedimentary mineral specimens identified by the Rock Identifier community.
Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
Turquoise
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Blue Chalcedony
Silicon Dioxide (SiO2)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Jasper (Multi-color Chert)
Silicon dioxide (SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
Carnelian
Carnelian (SiO2)
Sandstone
Arenite (SiO2 based)
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
Native Sulfur
Sulfur (S)
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
Quartz in Matrix
Silicon Dioxide (SiO2)
Yellow Chalcedony or River Jasper
Silicon Dioxide (SiO2)
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
Quartz
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
Chert
Silicon dioxide (SiO2)
White Marble
Recrystallized Calcite (CaCO3)
Geode (Unopened)
Siliceous Concretion / Geode
Gneiss
High-grade regional metamorphic rock (Foliated)
Sandstone (Stream Pebble)
Arenite (primarily SiO2)
Ferruginous Sandstone
Arenite with Iron-oxide cement
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
Sandstone (Quartzose Sandstone)
Clastic Terrigenous Sedimentary Rock (primarily SiO2)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Wallboard/Drywall (Gypsum-based)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O