Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sedimentary
Category
Sedimentary And Igneous
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Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite - Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite (a felsic intrusive igneous rock)
Igneous Rock
Calcite
Calcite (CaCO3)
mineral
Feldspar (Plagioclase / Potassium Feldspar)
Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Quartz (likely milky/gray variety)
Quartz (SiO₂)
Mineral
Granite Gravel / Pebbles
Granite (Plutonic Igneous Rock)
igneous
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Granite
Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Shale
Sedimentary Shale
sedimentary
Wishing Stone (Basalt or Chert with Quartz Veins)
Basalt or microcrystalline Quartz (Chert) with localized hydrothermal Quartz (SiO2) veining
igneous or sedimentary
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
igneous or sedimentary
Granite (phaneritic background) with Limestone/Calcite carving
Felsic Igneous Plutonic Rock (background) / Calcium Carbonate (CaCO3) (carving)
igneous and sedimentary
River Stone (likely Basalt or Chert)
Silicon Dioxide (SiO2) for chert or Mafic Extrusive Rock for basalt
igneous/sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary occurrence
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Shale / Mudstone
Sedimentary rock (Claystone / Mudstone / Shale)
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Dalmatian Stone and Lapis Lazuli
Dalmatian Stone (Felsic Igneous Rock) with Lapis Lazuli
igneous
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Shale
Argillaceous sedimentary rock
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Granite
Granite (a common type of Felsic Intrusive Igneous Rock)
Igneous Rock
Quartz (Milky/Smoky mix)
Silicon Dioxide (SiO2)
mineral
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Granite
Granite (composed of Quartz, Felspar, and Mica)
igneous
Granite
Granite
igneous
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous