Rose Quartz
Silicon Dioxide (SiO2)
mineral
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Amethyst
Quartz (SiO2)
gemstone
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz-veined Jasper
Microcrystalline quartz (SiO2) with quartz veins
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8Al6Si6O24Cl2
mineral
Leopard Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Fossilized Coral (Rugose or Tabulate) or Stromatolite
Phylum Cnidaria / Stromatolithus
fossil
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Howlite
Hydrated calcium boro-silicate (Ca2B5SiO9(OH)5)
mineral
Unakite
Altered Granite (composed of pink orthoclase feldspar, green epidote, and colorless quartz)
igneous
Amber
Fossilized Tree Resin
gemstone
Tumbled Rose Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Ripple Marks or Stromatolite
Sedimentary ripple mark imprint / Biosedimentary structure
fossil
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
mineral
Lapis Lazuli
Lapis Lazuli (Rock containing lazurite, calcite, and pyrite)
rock
Cobblestones (Basalt/River Rock)
Polished lithic fragments and rounded pebbles
sedimentary
Crinoid Fossil
Crinoidea (Echinodermata)
fossil
Red Jasper
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Basalt Pebble
Extrusive Igneous Rock
igneous
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Basalt
Extrusive Igneous Rock
igneous
Native Gold Nugget
Gold (Au)
mineral
Tsavorite Garnet
Grossular Garnet, Ca3Al2(SiO4)3
gemstone
Ruby (Cabochon)
Corundum (Al2O3)
gemstone
Ruby (Cabochon)
Corundum (Al2O3)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Wishing Stone with Quartz Vein
Quartz-veined sedimentary pebble
sedimentary
Fluorite
Fluorite (CaF2)
mineral
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Basalt Pebble
Aphanitic Igneous Rock / Basalt
igneous
Sandstone with Iron-Stained Band
Quartz Arenite / Sedimentary Rock
sedimentary
Lake Superior Agate
Quartz (Variety: Agate, SiO2)
mineral