Raw Garnet Fragment
Nesosilicate Group (e.g., Almandine, Fe3Al2(SiO4)3)
Category
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
Raw Garnet Fragment
Nesosilicate Group (e.g., Almandine, Fe3Al2(SiO4)3)
Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
Limonite (Iron-rich Gossan/Laterite)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Celestite
Celestine (SrSO4)
Turquoise in Matrix
Hydrous phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Schist
N/A (a rock type, not a mineral formula)
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Mixed Crushed Stone
Aggregate (varied mineral composition)
Granite
Intrusive Igneous Rock
Granite (Gneissic / Weathered Pebble)
Felsic intrusive igneous rock (Granite)
Gneiss
Gneiss
Gneiss
Gneiss
Diorite
Diorite
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
Banded Gneiss
Gneiss (Metamorphic Rock)
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
Sandstone
Arenite (composed primarily of SiO2)
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Tumbled purple jasper (likely)
Microcrystalline quartz/chalcedony, SiO₂, colored by iron and other trace minerals
Gossan (with Limonite/Hematite coating)
Ferruginous Gossan (Fe2O3·nH2O / Fe2O3)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Lapis Lazuli
Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
Quartz pebble
Silicon dioxide (SiO2)
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Bauxite
Bauxite (Aluminum Ore)
Greenstone
Metabasalt / Chlorite Schist
Limonite/Ironstone
Limonite (FeO(OH)·nH2O)
Rhodochrosite
Rhodochrosite (MnCO3)
Limonite (Iron Ore)
Limonite (unstructured hydrated iron(III) oxide-hydroxides, often FeO(OH)·nH2O)
Quartz Pebble
Silicon Dioxide (SiO2)
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
Dendritic sandstone
Sandstone with Manganese Oxide dendrites
Agate
Silicon Dioxide (SiO2)
Sandstone
Arenite
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O