Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Category
Man Made Rock (Technosol)
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Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Diorite
Intermediate plutonic igneous rock
igneous
White Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Quartzite
Quartzite (SiO2)
metamorphic
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Diamond (or Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Diamond
Native Carbon (C)
gemstone
Diamond (in a jewelry setting)
Carbon (C)
mineral
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
metamorphic
Pink Granite
Intrusive Igneous Rock (high K-feldspar content)
igneous
Diabase (Dolerite)
Diabase or Dolerite
igneous
Diamond
Carbon (C)
gemstone
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Chert (specifically Flint or Common Chert node)
Silicon Dioxide (SiO2)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)
igneous
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled Gabbro
Gabbro (Mafic intrusive igneous rock)
igneous
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
not a rock (man-made polymer)
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
igneous
Dyed Blue Agate Slice
Silicon Dioxide (SiO2)
mineral
Lapis lazuli and green-blue chalcedony jewelry
Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
gemstone
Hoodoo (Limestone / Siltstone Formation)
Claron Formation (Sedimentary Rock - Limestone, Mudstone, Dolomite)
sedimentary
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Petoskey Stone / Rugose Coral Fossil
Hexagonaria percarinata
fossil
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)