Sandstone (Red Flagstone)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
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Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite), SiO2
metamorphic
Pink Granite
Phaneritic Felsic Igneous Plutonic Rock
igneous
Blue Quartz (specifically Dumortierite Quartzite)
Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)
metamorphic
Obsidian
Obsidian (Volcanic Glass)
igneous
Moqui Marble (Moqui Ball)
Ironstone Concretion (Goethite/Hematite cemented Sandstone)
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
Mineral (Variety of Quartz)
Green Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Mica Schist
Schist (primarily muscovite and quartz)
metamorphic
Chert (specifically Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Pink Granite
Granite (Phaneritic intrusive rock rich in K-feldspar)
igneous
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Heliolite (Sodium Calcium Aluminum Silicate with Iron or Copper inclusions)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Carnelian Agate/Jasper blend
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Travertine (Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Pink Granite
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
metamorphic
Chert (specifically a weathered Chert nodule or fragment)
Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Agate (specifically a small Chalcedony nodule)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Quartzite (specifically a river-worn cobble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Quartz (specifically a water-worn Quartzite or Chalcedony pebble)
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically a water-worn pebble)
Gneiss
metamorphic
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral