Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Category
Man Made
Browse man made specimens identified by the Rock Identifier community.
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Granite
Granite (High-silica plutonic rock)
igneous
Vesicular Basalt
Vesicular Basalt
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Ironstone (Limonite/Goethite Concretion)
Ferruginous Sedimentary Rock (composed of Goethite FeO(OH) and Limonite)
sedimentary
Ferruginous Sandstone
Arenite with Hematite/Limonite cement
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Geode Fragment with Iron Staining
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite (Felsic Intrusive Igneous Rock)
igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar)
igneous
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
sedimentary
Ruby
Corundum (Al2O3 with chromium impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jade
Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Moqui Marble
Ironstone Concretion (Ferruginous sandstone)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite
Igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond (Pear Cut)
Carbon (C)
gemstone
Red Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Granite Cobble
Phaneritic Felsic Igneous Rock (Granite)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral
Sandstone (likely Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Iron Formation
Banded Iron Formation (BIF)
Metamorphic Rock
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Sandstone (likely Fossiliferous)
Arenite / Sedimentum arenaceum
sedimentary
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Milky Quartz with Hematite/Limonite staining
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral