Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Rose Quartz
Rose Quartz (SiO₂)
Mineral
Iron-stained quartz-rich rock, possibly goethite-bearing quartz
Quartz (SiO₂) with iron oxides/hydroxides, likely goethite or limonite
mineral
Coquina
Bioclastic Limestone (CaCO3)
sedimentary
Sandstone (with Lichen)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Agate Geode Slice with Druzy Quartz
Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz
mineral
Seashell Fossil
Invertebrate Bivalve / Gastropod Fossil (Calcium Carbonate, CaCO3)
fossil
Red Sandstone (Old Red Sandstone)
Ferruginous Sandstone (SiO2 + Fe2O3)
sedimentary
Red Jasper (possibly banded Jaspilite)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
sedimentary
Weathered dark rock fragment
Indeterminate; possibly basalt or iron-rich volcanic rock
igneous
Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Unknown Tumbled Stone
Unknown (Too Blurry)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Sandstone
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Limonite
FeO(OH)•nH2O
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Cockle Shell (Bivalve)
Cardiidae (Calcium Carbonate, CaCO3)
fossil
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Mineral for Fluorite; Mineral/Rock for Jadeite (as it's often a rock composed primarily of jadeite mineral)
Rough Diamond (or Herkimer Diamond Quartz)
Diamond (C) or Quartz (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Jasper and Quartz Breccia
Silicified Breccia / Microcrystalline Quartz
sedimentary
Sandstone Pebble
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Limonite
FeO(OH)•nH2O
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Tumbled serpentine with dark magnetite/chromite matrix
Serpentinite; chiefly antigorite/lizardite, Mg3Si2O5(OH)4, with magnetite and possibly chromite
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary