Polished granite slab with a silver jewelry item
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous
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Mineral, Part Of A Rock
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Granite
Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Lichen-covered granite
Granite, chiefly quartz–feldspar–mica; surface colonized by lichens
igneous
Granite
Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))
igneous
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Quartz-rich granite pebble
Granite, composed mainly of quartz, feldspar, and mica
igneous
Basalt River Stone with Mineral Crust
Aphanitic Mafic Igneous Rock
igneous
Weathered granite or granitic gneiss boulder
Granite–gneiss; chiefly quartz, feldspar, and mica
igneous
Granite Cobble
Plutonic Igneous Rock (Granitic)
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Granite
Granite (Felsic Plutonic Igneous Rock)
igneous
Granite
Intrusive Igneous Rock
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Granite Pebble
Granite (Plutonic Igneous Rock)
igneous
Granite
Phaneritic plutonic rock (High silica)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz geode slice
Quartz (SiO₂), likely chalcedony-lined geode with drusy quartz
mineral
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)
igneous
Iron-rich sandstone (Gozan/Ironstone)
Ferruginous Sandstone (clastic sedimentary rock)
sedimentary
Banded Greywacke
Greywacke (Lithic wacke)
sedimentary
Red Granite
Phaneritic Felsic Igneous Rock
igneous
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Gneiss (probable, weathered fragment)
Foliated metamorphic rock composed mainly of quartz, feldspar, and mica; composition may be granitic or migmatitic.
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Conglomerate
Conglomeratic Sandstone
sedimentary
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Black-and-white granite (likely granodiorite)
Granite: quartz, feldspar, and dark mica/amphibole; exact identification is uncertain from the photo
igneous
Emerald In Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Small iron-stained quartz pebble
Quartz (SiO₂), with yellow-brown iron-oxide staining
mineral
Granite pebble
Granite, a quartz–feldspar plutonic rock with dark biotite or hornblende
igneous
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous
Fossilized Oyster Shell
Exogyra or Ostrea (Gryphaeidae/Ostreidae family)
fossil
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Bivalve Fossil (Mussel or Clam Shell)
Bivalvia
fossil
Granite
Intrusive Igneous Rock
igneous
Polished porphyritic granite (likely pink granite)
Feldspar–quartz–biotite granite; exact identification requires testing
igneous