Sandstone
Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)
Sedimentary Rock
Category
Mineral (Native Element)
Browse mineral (native element) specimens identified by the Rock Identifier community.
Learn about Mineral (Native Element) in the encyclopedia
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Agate
Agate (a variety of Chalcedony, SiO2)
Mineral
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
mineral
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Citrine or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (with Iron Oxide staining)
Silicon Dioxide (SiO2)
mineral
Moldavite
Silica glass with small amounts of aluminum, iron, and other elements
Mineraloid / Tektite
Malachite
Cu2CO3(OH)2 (Copper carbonate hydroxide)
mineral
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Nephrite Jade
Nephrite
Mineral/Rock
Pink quartz-rich stone, likely rose quartz
Rose quartz; quartz, SiO₂, commonly colored by trace elements and microscopic inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Cluster (Likely Ferruginous)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Petrified Wood
Silicified wood, primarily composed of Quartz (SiO2)
Mineral, often found in sedimentary deposits
Gold
Aurum (Au)
Mineral (Metal)
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Sandstone
Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Pink Quartz (Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Rose Quartz
Rose Quartz (SiO2)
Mineral
Yellow Quartz
SiO2 (Crystalline Silicon Dioxide)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Coquina
Biogenic Limestone (Calcite/Aragonite base, CaCO3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral