Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Category
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Granite
Granite (Felsic Plutonic Rock)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Basalt with Vesicle/Vug
Basalt (Aphanitic Mafic Igneous Rock)
Sapphire
Corundum (Al2O3)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Green Quartz (Aventurine)
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
Citrine Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
Chert (specifically Yellow/Honey Jasper variety)
Cryptocrystalline Quartz (SiO2)
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Orange Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
Dinosaur Bone (Gembone)
Petrified Dinosaur Bone (Apatite/Silica replacement)
Yellow Calcite
Calcium Carbonate (CaCO3)
Ruby
Corundum (Al2O3 with Chromium trace elements)
Wild Horse Magnesite
Magnesite with Hematite inclusions (MgCO3)
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
Sandstone (Ferruginous)
Arenite (Fe-rich)
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Quartz Pebble
Silicon Dioxide (SiO2)
Schist
Mica Schist (primarily Muscovite and Quartz)
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Milk Quartz (Common White Quartz)
Quartz (Silicon Dioxide, SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Baroque Pearl
Biogenic Calcium Carbonate (Aragonite/Conchiolin)
Banded Agate
Cryptocrystalline Quartz (SiO2)