Quartz (Translucent/Rose variety)
Silicon Dioxide (SiO2)
mineral
Category
Igneous Or Sedimentary
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Porphyry
Porphyritic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
River Pebble (Basalt or Gabbro)
Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt (Weathered)
Mafic Igneous Rock
igneous
Basalt (with Iron Staining)
Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
Weathered Basalt with Iron Staining
Mafic Igneous Rock
igneous
Basalt (Vesicular)
Basalt (Extrusive Igneous)
igneous
Basalt
Mafic Igneous Pebble
igneous
Diorite (Polished River Stone)
Intrusive Igneous Diorite
igneous
Vesicular Basalt
Mafic Igneous Rock
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt with Iron Oxidation
Mafic Igneous Basalt
igneous
Basalt
Mafic Igneous Basalt
igneous
Diorite (River Cobble)
Intrusive Igneous Diorite
igneous
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (SiO2 with Fe2O3)
sedimentary
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Mudstone
Lutylite (group of fine-grained sedimentary rocks)
sedimentary
Sandstone
Arenite
sedimentary
Granite
Granite (phaneitic intrusive igneous rock)
igneous
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Igneous
Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Hornblende)
igneous
Granite
Granite (Phaneritic Igneous Rock)
igneous
Granite
Felsic Plutonic Rock (Granite)
igneous
Granite
Granite
igneous
Biotite in Host Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Diorite (Salt and Pepper Rock)
Diorite
igneous
Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)
Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)
mineral
Basalt
Basalt
igneous