Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Selenite Gypsum
Hydrous calcium sulfate (CaSO4·2H2O)
mineral
Fuchsite
Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Garnet (Pyrope or Almandine)
Silicate (X3Y2Si3O12)
mineral
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Citrine Quartz carving
Silicon Dioxide (SiO2)
mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Sandstone (specifically Red Sandstone)
Arenite (SiO2 with Iron Oxide)
sedimentary
Jasper (specifically Owyhee or Picture Jasper variety)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Schist (specifically Mica Schist)
Mica Schist
metamorphic
Basalt
Basalt
igneous
Pink Granite
Phaneritic plutonic rock (rich in Potassium Feldspar and Quartz)
igneous
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Red Sandstone
Arenite (SiO2 based with Fe2O3)
sedimentary
Moqui Marble (Concretion)
Iron Oxide Concretion
sedimentary
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Blue Celestine
Celestine (SrSO4)
mineral
Moonstone (with Tourmaline/Mica)
Orthoclase/Albite Feldspar (KAlSi3O8 / NaAlSi3O8)
mineral
Rainbow Moonstone
White Labradorite (Feldspar variety)
mineral
Basalt
Aphanitic Mafic Igneous Rock
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Pink Granite
Granite (Alkali Feldspar Granite)
igneous
Agate (Polished Sphere)
Silicon Dioxide (SiO2)
mineral
Quartz with Feldspar and Mica (Pegmatite Fragment)
Granitic Pegmatite
igneous
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Basalt
Mafic volcanic rock
igneous
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Sapphire in a ring
Corundum (Al2O3)
mineral
Granite
Intrusive igneous felsic rock
igneous
Gravel and Pebbles
Unconsolidated rock fragments (clastic sediment)
sedimentary
Puddingstone (specifically Michigan/Gowganda Puddingstone)
Conglomerate (Jasper Conglomerate)
sedimentary
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Feldspar (Orthoclase/Microcline)
Potassium Feldspar (KAlSi3O8)
mineral
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Quartz Sand (Beach Sand)
Silicon Dioxide (SiO2)
sedimentary