Yellow Quartzite
Quartzite (SiO2)
metamorphic
Category
Anthropogenic (Man Made Artifact)
Browse anthropogenic (man made artifact) specimens identified by the Rock Identifier community.
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
Agate (Carnelian-Blue Agate mix)
Silicon Dioxide (SiO2)
mineral
Basalt with Caliche
Extrusive Mafic Igneous Rock with Secondary Carbonate Crust
igneous
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
mineral
Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)
SiO2 with TiO2 inclusions (Quartz with Rutile)
Mineral
Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Druzy Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)
igneous
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
Basalt
Basalt (SiO2 percentage between 45% and 52%)
igneous
Strawberry Quartz
Quartz (SiO2) with inclusions of Goethite or Hematite
Mineral
Chert / Greenstone
Silicon Dioxide (SiO2) with impurities
sedimentary
Selenite
Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite
Mineral
Banded Jasper
Silicon Dioxide (SiO2)
Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)
Sunstone (variety of Feldspar)
Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8
Mineral
Citrine
Quartz (SiO₂)
mineral
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
River Rock (likely Quartzite or Chert)
Quartzite (primarily SiO2)
metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Pink Granite (Water-worn Cobble)
Phaneritic Felsic Intrusive Igneous Rock
igneous
Porphyritic Rhyolite
Porphyritic Rhyolite
igneous
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Caliche (with Lichen Cover)
Calcium carbonate-cemented soil layer (CaCO3)
sedimentary
Vesicular Basalt
Vesicular Basalt (Aphanitic Mafic Igneous Rock)
igneous
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Chert (Jasper/River Stone)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Nodular)
Microcrystalline Silica (SiO2)
sedimentary
Limonite (Ironstone Concretion)
Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Dolomite
Dolomite (CaMg(CO3)2)
Mineral
Milky Quartz
Quartz (SiO2)
Mineral
Moonstone
Adularia (orthoclase) or Albite (plagioclase), a feldspar mineral (KAlSi3O8 or NaAlSi3O8 respectively, often a mixture)
mineral
Black Chert
Chert (microcrystalline quartz)
Mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Rutilated Quartz
SiO2 with TiO2 inclusions
Mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral