Basalt
Basalt (primarily Plagioclase feldspar and Pyroxene)
igneous
Category
Man Made Rock (Technosol)
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Basalt Pebble
Vesicular Basalt
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Basalt
Basalt (Extrusive Igneous Rock)
igneous
Basalt River Cobble
Extrusive Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Basalt
Basalt
igneous
Basalt Pebble
Extrusive Mafic Igneous Rock
igneous
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite Cobble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
igneous
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Unakite Epidote Granite
Unakite (Rock composed of Orthoclase, Epidote, and Quartz)
metamorphic
Granodiorite
Granodiorite
igneous
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Unakite
Unakite (Altered Granite)
metamorphic
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Lapis Lazuli (Low Grade)
Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)
metamorphic
Sandstone
Arenite
sedimentary
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Green Quartzite
Quartzite (primarily SiO2 with chlorite inclusions)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Quartzite-rich River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (specifically Iron-stained or Argillaceous Limestone)
Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky quartz (rough quartz chunk)
Quartz, silicon dioxide (SiO₂)
mineral
Unakite
Epidotized Granite
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Granite (Pebble)
Granite (Plutonic Igneous Rock)
igneous
Slate
Slate (foliated metamorphic rock)
metamorphic
Chert Pebble with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Scoria
Extrusive Basaltic Scoria
igneous