Basalt
Basalt (Mafic Extrusive)
igneous
Category
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Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 based)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Blue Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO₂)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chondrite Meteorite
Ordinary Chondrite (Undifferentiated Stony Meteorite)
meteorite
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
sedimentary
Quartzite (River Pebble)
Quartzite, dominated by Silicon Dioxide (SiO2)
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Gold
Native Gold (Au)
mineral
Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Jasper (Yellow Jasper)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Basalt (River Stone)
Basalt
igneous
Common Opal
Hydrated Silica (SiO2·nH2O)
mineral
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Gold Nugget
Native Gold (Au)
mineral
Healer's Gold (Pyrite and Magnetite in Schist)
Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Rock Salt (Halite)
Halite (Sodium Chloride, NaCl)
mineral
Amethyst
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8 with lead impurities)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
sedimentary
Obsidian
Volcanic glass (SiO2)
igneous
Granodiorite Pebble
Granodiorite
igneous
Basalt with Weathered Rind
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Granodiorite
Intermediate Phaneritic Plutonic Rock
igneous
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid