Yellow Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Category
Sedimentary (Physico Chemical Precipitate)
Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.
Quartzite (Milky)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite Pebbles
Meta-quartzite (SiO2)
metamorphic
Native Gold (in Jewelry form)
Gold (Au)
Mineral
Gold Nugget
Native Gold (Au)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Ferruginous Quartz
Iron-stained Quartz (SiO2 with Fe2O3 impurities)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)
Porphyritic Basalt (Mafic Extrusive)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Vitreous volcanic silicate rock (SiO2) with Spherulite inclusions
igneous
Gold Ore in Quartz/Matrix
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Labradorite (tumbled)
Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)
Mineral
Jasper with Pyrite (Gold-colored inclusions)
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
sedimentary (chemical/biological)
Jasper (Milky/Cream Variety)
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary (chemical/biological)
Basalt with Weathering Crust
Extrusive mafic volcanic rock
igneous
Pink Dyed Agate
Chalcedony (SiO2) with artificial dyes
mineral
Sea Glass
Amorphous Silica (SiO2) with various additives
Mineraloid (Anthropogenic)
Basalt (River Cobble)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Dzi Bead (Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Aragonite (Onyx Marble)
Aragonite / Calcium Carbonate (CaCO3)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
Mineral
Feldspar Rich Granite with Limonite Staining
K-Feldspar Granite (KAlSi3O8)
igneous
Basalt with Iron Oxidation
Mafic Igneous Rock (Basalt)
igneous
Zircon
Zirconium Silicate (ZrSiO₄)
mineral
Granite (Weathered/Oxidized)
Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)
igneous
Banded Jasper
Silicon Dioxide (SiO2)
Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolites, Calcite, or Quartz)
igneous
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with Elemental Gold (Au)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral