Mineral, Part Of A Rock

Porphyritic Igneous Rock / Basalt or Andesite Xenolith in Granite or Quartzite

Silicate rock with contrasting xenolith/inclusion

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)

Basalt Breccia

Volcanic Breccia (composed of basaltic clasts in a fine-grained matrix)

Granite

Felsic intrusive igneous rock

Granite

Granite (Felsic Plutonic Rock)

Granite

Intrusive Phaneritic Felsic Igneous Rock

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Hagstone (Adder Stone)

Chert or Sedimentary pebble with natural perforation

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Sandstone (River Cobble)

Clastic Sedimentary Rock (primarily Quartz with Feldspar)

Peridotite (with Olivine)

Peridotite (dominantly (Mg, Fe)2SiO4)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Granite

Phaneritic Plutonic Felsic Rock

Granite

Phaneritic Igneous Rock (Granite)

Quartz with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)

Granite

Phaneritic Felsic Igneous Rock

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Biotite (Black Mica)

Biotite [K(Mg,Fe)3(AlSi3O10)(F,OH)2]

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Granite

Granite (Phaneritic Quartz-rich Igneous Rock)

Gabbro (or Basalt Pebble)

Mafic Intrusive/Extrusive Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Pink Granite

Phaneritic intrusive igneous rock (K-feldspar rich)

Granite

Phaneritic Igneous Rock (Granite)

Granite

Felsic intrusive igneous rock

Granite

Granite (Phaneritic igneous rock)

Granite

Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)

Granite

Intrusive Igneous Rock

Gabbro

Gabbro (Mg,Fe)2Si2O6 and CaAl2Si2O8

Coarse Sand Grain / Lithic Fragment

Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)

Granite Pebble

Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Granite Boulder

Felsic Intrusive Igneous Rock

River Cobble (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneissic/Schistose)

Polished granite countertop with fossil shell

Granite; shell likely a fossilized bivalve or gastropod

Granite

Phaneritic Igneous Rock (Granite)

Granite

Intrusive igneous rock (Acidic)

Biotite (Mica)

Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Peridotite (Olivine/Peridot)

Peridotite (comprising (Mg,Fe)2SiO4)

River Rock (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneiss)

Granite

Granite (Phaneritic igneous rock composed primarily of Quartz and Feldspar)