Pyrite
Iron Sulfide (FeS2)
Category
Browse mineral (impactite) specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
Tiger's Eye (dark/grey variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (SiO2 primarily)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Satin Spar (Gypsum variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Black Obsidian and Hematite
Volcanic Glass (SiO2) and Hematite (Fe2O3)
Obsidian
Volcanic glass
Green Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
Agate
Silicon dioxide (SiO2) - variety Chalcedony
Schorl (Black Tourmaline) in Matrix
Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
Banded Agate
Silicon Dioxide (SiO2)
Unakite
Epidotized Granite
Sandstone
Arenite (primarily SiO2)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Pyrite
Iron Sulfide (FeS2)
Gypsum Wallboard (Drywall)
Hydrous calcium sulfate (CaSO4·2H2O)
Sandstone
Arenite (SiO2 based)
Tiger's Eye
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Sandstone
Arenite
Sandstone
Arenite
Orange Calcite
Calcium Carbonate (CaCO3)
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
Rose Quartz
Silicon dioxide (SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Diorite (Salt and Pepper Rock)
Diorite
Diorite
Diorite
Diorite
Phaneritic Intermediate Igneous Rock
Red Granite
Phaneritic Felsic Igneous Rock
Granite (Alkali-feldspar Granite)
Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)
Granite
Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)