Greenstone
Greenschist (metamorphosed mafic igneous rock)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Greenstone
Greenschist (metamorphosed mafic igneous rock)
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
Quartz (Milky Quartz with Iron Staining)
Silicon Dioxide (SiO2)
Epidote (likely Unakite component or Epidosite)
Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))
Corundum (Ruby Variety)
Corundum (Al2O3)
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Granite Pebble (Salt and Pepper Granite)
Felsic Intrusive Igneous Rock (Granite)
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
Sandstone
Arenite
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Hag Stone
Perforated Sedimentary Rock
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
Basalt with Amygdules
Amygdaloidal Basalt
Muscovite Mica (Granitic Pegmatite)
Muscovite - KAl2(AlSi3O10)(OH)2
Sandstone
Arenite (Sedimentary Rock)
Diorite
Intermediate plutonic igneous rock
Limestone Breccia
Sedimentary Breccia (Calcareous)
Granite (Leucogranite)
Felsic Plutonic Rock (Granite)
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Obsidian
Amorphous volcanic glass (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)
Peach Moonstone
Potassium Aluminum Silicate, KAlSi3O8
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2AlSi3O10(OH)2
Aventurine
Quartz (SiO2) with inclusions of Fuchsite
Rainbow Moonstone
White Labradorite (formula: (Na,Ca)(Al,Si)4O8)
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
Corundum
Corundum (Aluminium oxide, Al2O3)
Sunstone (Feldspar)
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)