Iron (Hematite variety)
Iron (Fe) / Hematite (Fe2O3)
mineral
Category
Sedimentary (If Natural Jasper) Or Artificial (If Slag)
Browse sedimentary (if natural jasper) or artificial (if slag) specimens identified by the Rock Identifier community.
Amber (Rough Baltics/Beach Specimen)
Succinicum (Organic Gemstone - Fossilized Resin)
mineral
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
igneous
Granite (Pink/Red Orthoclase variety)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Lunar Feldspathic Breccia
Lunar Meteorite (Feldspathic Regolith Breccia)
igneous
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Granite Pebble
Granite (Phaneritic Acidic Igneous Rock)
igneous
Pumice
Vesicular volcanic glass (Amorphous silica mixed with various oxides)
igneous
Granatic Pegmatite
Pegmatitic Granite
igneous
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Mahogany Obsidian
Volcanic Glass (predominantly SiO2 with inclusions of Hematite or Magnetite)
igneous
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Amethyst Agate (Polished Point)
Silicon Dioxide (SiO2) with iron impurities
mineral
Orange Calcite
Calcite (CaCO3)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite Pebble (River Rock)
Phaneritic Felsic Igneous Rock
igneous
Quartz (Milky/Yellowish)
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO2)
metamorphic
Greenschist (Greenstone)
Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)
metamorphic
Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Quartzite (Yellow/Iron-Stained)
Quartzite (SiO2 with Iron Oxide impurities)
metamorphic
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Vesicular Basalt (Scoria)
Aphanitic Mafic Igneous Rock (Vesicular Basalt)
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Veining
Basalt (Mafic Extrusive Igneous Rock) with SiO2 (Silicon Dioxide) veins
igneous
Greenstone (Epidote/Chlorite Rich Rock)
Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Granitic Pegmatite
Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)
Igneous
Amber
Succinite
Mineraloid
Sandstone
Quartz Sandstone (predominantly)
Sedimentary