Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich Silicate)
igneous
Category
Industrial Byproduct (Anthropogenic Rock)
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Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Pumice
Pumicite / Vesicular Rhyolite
igneous
Iron meteorite (probable)
Fe–Ni metallic meteorite, commonly kamacite–taenite
meteorite
Granite
Granite (Felsic Plutonic Rock)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Schist
Mica Schist
metamorphic
Chert (Nodule)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic
Diamond (Heart Cut)
Carbon (C)
gemstone
Sandstone Cobble
Arenite (predominantly Quartz Sandstone)
sedimentary
Olivine (Peridotite)
(Mg, Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Weathered quartz-rich rock fragment
Likely quartz-bearing feldspathic rock; exact identification requires testing
mineral
Dyed or color-enhanced agate/microcrystalline quartz bead
Chalcedony (microcrystalline SiO₂), likely agate
gemstone
Diamond in Kimberlite
Kimberlite host rock with C (Carbon) inclusion
igneous
Polished red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides.
mineral
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Sandstone River Pebble
Arenite (SiO2 predominantly)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Fulgurite
Lechatelierite (Silica glass), typically SiO2
mineraloid
Chert (specifically Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt with Oxidized Crust
Vesicular Basalt (Iron-rich extrusive volcanic rock)
igneous
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Garnet Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Granodiorite
Granodiorite
igneous
Pumice
Pumice (a vesicular volcanic glass)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral