Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
Category
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
Eclogite
Eclogite (Omphacite + Pyrope)
Shale
Laminated Mudstone
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Gneiss (specifically a Granitic Gneiss)
Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)
Nickel
Nickel (Ni)
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
Bornite
Bornite (Cu5FeS4)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
Bauxite (Aluminum Ore)
Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Ironstone (likely Limonite or Goethite nodule)
Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)
Ironstone Concretions (Ironstone)
Ferruginous Sandstone or Siltstone (Fe2O3)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
Fossilized Shark Tooth
Carcharodon (Galeocerdo sp. or Lamniform)
Quartz Geode/Druzy Quartz
Quartz (SiO₂)
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)
Granite
Granite (Felsic Plutonic Rock)
Quartz Vein in Host Rock (Gossanous Matrtix)
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
Native Copper
Native Copper (Cu)
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Turquoise in Matrix
Hydrous phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Obsidian
Amorphous volcanic glass (70-75% SiO2)
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
Limonite and Goethite on Gossan
FeO(OH)·nH2O
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
Limonite (Iron Ore)
Limonite (unstructured hydrated iron(III) oxide-hydroxides, often FeO(OH)·nH2O)
Unable to identify - Image contains non-geological items
Malachite
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Pyrite
Iron Sulfide (FeS2)
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
Greenstone
Greenschist (metamorphosed mafic igneous rock)