Magnetite
Iron(II,III) oxide (Fe3O4)
Category
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Magnetite
Iron(II,III) oxide (Fe3O4)
Pyrite-bearing sulfide specimen (likely pyrite)
Pyrite, FeS₂; possibly mixed with pyrrhotite or chalcopyrite
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
Tumbled granite or granitic gneiss pebble
Granite/granitic gneiss, chiefly quartz, feldspar, and dark biotite or amphibole
Quartz Boulder
Silicon Dioxide (SiO2)
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Unakite
Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)
Mixed pebble collection, including likely flint, quartzite, and fossil material
Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
Granite (weathered fragment)
Granite; chiefly quartz, alkali feldspar, plagioclase, and mica
Polymictic conglomerate or breccia (possibly concrete-like aggregate)
Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates
Mixed tumbled stones, likely rose quartz and purple quartz/amethyst
Quartz (SiO₂), including amethyst and probable rose quartz; exact identification is uncertain from the blurred image
Tumbled hematite (likely hematite-rich ironstone)
Hematite, Fe₂O₃; possibly mixed with magnetite or goethite
Mixed tumbled quartz specimens
Quartz, silicon dioxide (SiO₂), including rose quartz and milky/included varieties
Weathered conglomeratic breccia
Polymictic conglomerate/breccia, likely iron-stained
Weathered iron-rich rock, possibly hematite-bearing breccia
Hematite (Fe₂O₃)-rich lithic fragment; exact host rock is uncertain from the image
Mixed small mineral specimens
Likely quartz varieties with possible rose quartz and iron-stained quartz; exact identification is uncertain from the blurred image
Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)
Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage
Sodalite
Na8Al6Si6O24Cl2
Likely quartz-bearing rock fragment
Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions
Blue-andalusite (likely chiastolite-bearing metamorphic fragment)
Andalusite, Al₂SiO₅; possibly mixed with quartz/mica
Pyrite-bearing sulfide ore
Pyrite (FeS₂), possibly mixed with chalcopyrite and/or other sulfides
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
Gneiss
Gneiss (Metamorphic Rock)
Pink Granite
Phaneritic Plutonic Felsic Rock (K-feldspar rich)
Pink Granite (Gneissic Granite)
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
Dragon Blood Jasper
Epidote with Red Jasper (Quartz-rich aggregate)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Granite or granitic gneiss pebble
Quartz–feldspar–mica aggregate; likely granite, possibly foliated gneiss
Likely gray granite fragment
Granite, composed mainly of quartz, feldspar, and mica
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
Quartz (Agate/Jasper pebble)
Silicon Dioxide (SiO2)
Quartz Crystal
Silicon Dioxide (SiO2)
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Clear Quartz
Silicon Dioxide (SiO2)
Pink Granite
Phaneritic intrusive igneous rock with dominant Alkali Feldspar
Pegmatite
Igneous Pegmatite (Quartz, Feldspar, Micas)
Epidote (Unakite variety)
Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))
Unakite
Altered Granite (Epidotized Granite)