Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
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Jadeite
NaAlSi2O6
gemstone
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Bronzite
Enstatite (magnesium iron silicate), (Mg,Fe2+)SiO3
mineral
Basalt
Extrusive Igneous Rock
igneous
Blue Aventurine
Quartz (Silicon Dioxide, SiO2) with inclusions
mineral
Granite with Quartz/Pegmatite
Intrusive Igneous Rock
igneous
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Quartz with Mica (Muscovite/Biotite)
Silicon Dioxide (SiO2) with Phyllosilicate inclusions
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Tanzanite
Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Granite
Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase
igneous
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Plutonic Igneous Rock
igneous
Petrified Wood
Silicified wood (SiO2)
fossil
Limestone (Weathered)
Calcium Carbonate (CaCO3)
sedimentary
Quartz-veined Sandstone
Sedimentary rock with quartz vein (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Granite Pebble
Granite
igneous
Quartzite
Quartzite (Metamorphosed quartz sandstone)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary