Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Category
Browse mineral (man made aura treatment) specimens identified by the Rock Identifier community.
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Fluorite
Calcium fluoride (CaF2)
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
Granite
Felsic Intrusive Igneous Rock
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
Quartz (Granular Milky Quartz fragment)
Silicon Dioxide (SiO2)
Sandstone
Arenite
Chalk
Carbonate rock (mainly CaCO3)
Granite
Granite (Felsic Plutonic Rock)
Green Fluorite
Calcium Fluoride (CaF2)
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Hematite (Iron Ore)
Hematite (Fe2O3)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
Fluorite
Calcium Fluoride (CaF2)
Blue Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
Unakite
Unakite (Metasomatized Granite)
Pyrite
Iron Sulfide (FeS2)
Fluorite (Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
Schist
Mica Schist
Chert (Flint)
Silicon Dioxide (SiO2)
Diamond
Carbon (C)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Obsidian
Volcanic Glass (SiO2 - Silicon Dioxide with impurities)
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
Granite
Granite (Felsic Plutonic Rock)
Fluorite Tower
Calcium Fluoride (CaF2)
Carnelian
Carnelian Chalcedony (SiO2)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Coprolite
Coprolite
Gold Nugget
Native Gold (Au)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Red Jasper (Opaque Chalcedony)
Jasper / Silicon Dioxide (SiO2) with Ferric Iron inclusions
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)