Granite
Phaneritic Felsic Igneous Rock
igneous
Category
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Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Quartz Vein in Matrix (Breccia / Host Rock with Quartz)
Silicon Dioxide (SiO2) in Host Rock Matrix
metamorphic
Basalt with Quartz Veining
Veined Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine with quartz/calcite infill)
igneous
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Granite or Granitic Gneiss River Rock
Granite / Gneiss
Igneous or Metamorphic
Peridotite
Ultramafic intrusive igneous rock
igneous
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Granite Pebble
Granitoid (Plagioclase, Alkali feldspar, Quartz, Biotite/Amphibole)
igneous
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Pebble (Likely Basalt or Siltstone)
Clastic sedimentary rock or mafic volcanic rock
Igneous or Sedimentary
Sandstone Pebble
Arenite (Sandstone)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Sandstone (Red)
Arenite (composed primarily of SiO2)
sedimentary
Weathered granite pebble
Granite, mainly quartz, feldspar, and mica; approximate composition SiO₂-rich continental crust
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions
metamorphic
Granite
Plutonic Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
K-Feldspar Granite Fragment
Granite (Alkali Feldspar-rich)
igneous
Small dark mineral/rock fragment
Indeterminate; possibly magnetite-bearing basalt or iron-rich slag
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Granite Pebble
Intrusive Igneous Rock
igneous
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chalcedony (Agate / Moss Agate)
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Igneous Rock (Mainly Quartz, Feldspar, and Mica)
igneous
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Schist
Mica Schist (Medium-grade Metamorphic Rock)
Metamorphic
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Rugose Coral Fossil
Order Rugosa
fossil