Gneiss with Iron Staining and Sulfide Mineralization
Metamorphic Gneiss / Amphibolite with Iron/Sulfide Oxidation
metamorphic
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
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Obsidian
Obsidian (Volcanic Glass, SiO2 + impurity)
Igneous
Blue Quartzite
Silicon Dioxide (SiO2) with inclusions
metamorphic
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Flower Agate (Cherry Blossom Agate)
Chalcedony (SiO2) with Opaque Inclusions
mineral
Obsidian
Volcanic glass (high silica volcanic rock)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Limonite
Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O
mineral
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Gneiss
Gneiss
metamorphic
Septarian Nodule (Pebble)
Septarian concretion (composition: CaCO3, calcite, aragonite, and clay/mudstone)
sedimentary
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
sedimentary
Schist
Schist (Metamorphic Rock)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Banded Gneiss
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Limonite (Ironstone) pseudomorph
Limonite (Hydrous ferric oxide), FeO(OH)·nH2O
mineral
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Quartz Pebble (with Mica or Iron staining)
Silicon Dioxide (SiO2)
mineral
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Amygdaloidal Basalt
Vesicular Basalt with Amygdules
igneous
Banded Quartzite or Gneissic Pebble
Quartzite with mafic inclusions (SiO2) or Banded Gneiss
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Red Vanadinite on Matrix
Vanadinite (Pb5(VO4)3Cl)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Chrysocolla (Copper Ore matrix)
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Native Sulfur
Sulfur (S)
mineral
Quartz with Mica
SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)
Mineral
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineralized Apatite / Bio-apatite)
fossil
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Sandstone (Red Sandstone)
Arenite
sedimentary
Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Fossilized Coral (Petoskey Stone or similar Rugose Coral)
Hexagonaria percarinata (or similar Rugose/Tabulate coral)
fossil
Ammonite Fossil
Ammonoidea (subclass)
fossil
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
mineral
Clear Quartz Crystal (Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral