Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite
Plutonic felsic rock (Quartz, Feldspar, Mica)
igneous
Amygdaloidal Rhyolite
Amygdaloidal felsic extrusive rock
igneous
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Calcareous Sandstone)
Calcareous Sandstone (primarily SiO2 with CaCO3 cement)
sedimentary
Amber
Succinite (specifically for Baltic amber); chemical formula approximately C10H16O
Mineraloid
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Ironstone Concretion (Moqui Marble type)
Ferruginous Concretion (Fe2O3 / FeO(OH))
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Sandstone (Ferruginous/Red Sandstone)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Granite (Light-colored quartz/feldspar variety)
Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzite texture)
Arenite (SiO2 secondary)
sedimentary
Marble
Metamorphosed Limestone/Dolomite
metamorphic
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Schist
Mica Schist
metamorphic
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Quartz (Milky Quartz / Greenish Quartz)
SiO2 (Silicon Dioxide)
mineral
Conglomerate
Conglomerate
Sedimentary Rock
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite Pebble (Weathered)
Phaneritic Felsic Igneous Rock
igneous
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
sedimentary
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
sedimentary