Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Category
Industrial Byproduct
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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
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Planet Earth
Gaia (Silicate Terrestrial Planet)
metamorphic
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
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
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
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Mica in Quartz Host
Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)
igneous
Ironstone with Limonite/Goethite coating
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)
sedimentary
Coal (Bituminous / Anthracite)
Carbonaceous Sedimentary Rock (C)
sedimentary
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Rough Diamond
Natural Diamond (Carbon, C)
mineral
Vesicular basalt (likely scoria)
Basaltic scoria; predominantly plagioclase, pyroxene, and olivine in a mafic volcanic glass/microcrystalline matrix
igneous
Unknown dark mineral fragment
Indeterminate; possibly a dark silicate mineral or slag-like geological fragment
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Quartzite
Quartzite (SiO2)
metamorphic
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
igneous
Diamond
C (Carbon)
gemstone
Coal (Anthracite or Bituminous)
Carbonaceous sedimentary rock (Carbon)
sedimentary
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral
Bituminous Coal
Bituminous coal (Carbonaceous sedimentary rock)
sedimentary