Sandstone
Arenite (SiO2 dominant)
sedimentary
Category
Antropogenic (Man Made Glass Byproduct)
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
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Copper and Quartz beads
Native Copper (Cu) and Crystalline Quartz (SiO2)
mineral
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
mineral
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled honey calcite (probable)
Calcite, calcium carbonate (CaCO₃)
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
igneous
Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth)
Silicon Dioxide (SiO2)
mineral
Olivine (in Peridotite/Dunite form)
Magnesium Iron Silicate (Mg,Fe)2SiO4
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Polished basalt (likely vesicular basalt)
Basalt; predominantly plagioclase, clinopyroxene, and commonly olivine or iron-titanium oxides
igneous
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist; principally muscovite mica, biotite, quartz, and feldspar
metamorphic
Polished labradorite
Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
sedimentary
Sandstone
Sedimentary quartz arenite
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Quartzite / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Sandstone
Arenite (SiO2 with various cementing agents)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Pumice
Pumice
igneous
Quartz-bearing granite or granitic gneiss cobble
Granite; primarily quartz (SiO₂), feldspar, and mica/amphibole
igneous
Granite (likely biotite granite)
Coarse-grained granitic rock; chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Metallic iron meteorite fragments (probable)
Iron meteorite, chiefly kamacite (α-(Fe,Ni)) with possible taenite
meteorite
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite
igneous
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Polished amber-colored stone, possibly chert or jasper
Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper
mineral