Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Category
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Pyrite
Iron Disulfide (FeS2)
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Limonite/Hematite Ironstone
Goethite-rich Ironstone (FeO(OH) · nH2O)
Carnelian
Carnelian (SiO2)
Orange Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide inclusions)
Lapis Lazuli
Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Schist
Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
Quartzite with inclusions
Quartzite (primarily SiO2)
Labradorite (specifically Larvikite beads)
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
Limonite-stained Quartzite
Quartzite with Limonite (FeO(OH)·nH2O) staining
Red Quartzite
Quartzite (SiO2)
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Hematite
Iron(III) oxide (Fe2O3)
Howlite
Howlite (Ca2B5SiO9(OH)5)
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine/Lemon Quartz)
Silicon Dioxide (SiO2)
Mica Schist
Mica Schist (Quartz-Biotit-Muscovite Schist)
Banded Agate (specifically Carnelian Agate slice)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Chalcedony (Moonstone variant or White Agate)
Silicon Dioxide (SiO₂)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Pegmatite (Granitic) with Tourmaline
Granitic Pegmatite (containing Schorl and Quartz)
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Milky Quartz
Silicon Dioxide (SiO2)
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
Quartz Pebble
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)