Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Industrial Byproduct (Anthropogenic Material)
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Quartz with Iron Staining
Crystalline Silicon Dioxide (SiO2)
mineral
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
River Quartz Cobble
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Vanadinite on Matrix
Vanadinite (Pb5(VO4)3Cl)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Quartzite (specifically a river-worn pebble)
Quartzite (primarily SiO2)
metamorphic
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Blue Sapphire
Corundum (Al2O3)
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
mineral
Quartz Pebble (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Fluorite, Sodalite, and Rose Quartz collection
Calcium Fluoride (CaF2), Sodium Aluminum Silicate with Chlorine (Na8(Al6Si6O24)Cl2), Silicon Dioxide (SiO2)
mineral
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Quartz Geode (Water-worn)
Silicon Dioxide (SiO2)
mineral
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Gold in Quartz
Hydrothermal Quartz with Native Gold (SiO2 with Au)
mineral
Milky Quartz Chip
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Calcite-rich Fossiliferous Limestone (CaCO3)
sedimentary
Kaolinite (China Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Limestone (Travertine/Tufa variant)
Calcium Carbonate (CaCO3)
sedimentary
Vesicular Basalt (or Scoria)
Extrusive mafic igneous rock
igneous
Pumice
Pumicite (Volcanic glass with vesicular texture)
igneous
Pumice
Pumiceous rhyolite
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pumice
Pumice (a vesicular volcanic glass)
igneous
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
River Stone (likely Siltstone or fine-grained Quartzite)
Sedimentary clastic rock containing SiO2 and iron oxides
sedimentary
Pumice
Pumice (Vesicular Felsic Glass)
igneous