Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Category
Not A Rock (Animated Character)
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Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Jasper
Chalcedony (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Anticrystalline / Synthetic Alloy
Quartzite
Quartzite (primarily SiO2)
metamorphic
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Dalmatian Jasper
Dalmatian Stone (comprised of Feldspar, Quartz, and Arfvedsonite)
igneous
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Quartzite (or Milky Quartz pebble)
Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)
metamorphic
Pink Himalayan Salt Rock (Halite)
Halite (Sodium Chloride, NaCl)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Serpentine
Antigorite/Chrysotile group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Vesicular Basalt
Extrusive mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of silica, SiO2)
metamorphic
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Quartzite
Quartzite (SiO₂)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Orange Quartzite
Quartzite (primarily SiO2 with Hematite impurities)
metamorphic
Mica Schist
Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)
metamorphic
Quartzite (specifically a river-worn cobble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite
Meta-quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Phaneritic plutonic felsic rock (Quartz, Feldspar, Mica)
igneous
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Quartz with Hematite
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
mineral
Tiger Diamond / Hematite-infused Quartzite
Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)
metamorphic
Ironstone Pebble
Ferruginous sedimentary rock (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Chert (Nodule)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Banded Agate
Chalcedony (SiO2) with impurities
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions
sedimentary