Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
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Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone Clast
Arenite (primarily SiO2)
sedimentary
Orange Crackle Quartz
Silicon Dioxide (SiO2) with thermal fracturing
mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Granite pebble
Granite, chiefly quartz, feldspar, and mica
igneous
Weathered granitic rock
Granite or granodiorite, likely quartz–feldspar–mica aggregate
igneous
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
metamorphic
Tumbled pale quartz/chalcedony fragment
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Blue calcite (likely)
Calcite, CaCO₃
mineral
Sandstone (Red Sandstone / River Stone)
Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)
sedimentary
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Jasper and Quartz Breccia
Silicified Breccia / Microcrystalline Quartz
sedimentary
Polished jasper (likely brecciated or iron-rich jasper)
Microcrystalline quartz (SiO₂), colored by iron oxides/hydroxides and possibly sulfide minerals
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Polished labradorite
Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Amazonite
Microcline (var. Amazonite) - KAlSi3O8
mineral
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Chlorastrolite (Greenstone)
Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O
mineral
Shark Tooth Fossil
Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)
fossil
Blue Topaz
Al2SiO4(F,OH)2
mineral
Limestone Gravel
Calcium Carbonate (CaCO3)
sedimentary
Green aventurine quartz sphere
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral
Quartz-rich rock, likely chert or chalcedony
Microcrystalline silica (SiO₂), possibly quartz/chalcedony
mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Iron-stained quartz-rich rock, possibly goethite-bearing quartz
Quartz (SiO₂) with iron oxides/hydroxides, likely goethite or limonite
mineral
Polished ocean jasper (orbicular jasper), probable
Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions
mineral
Polished pink feldspar pebble
Orthoclase or microcline feldspar, KAlSi₃O₈; exact identification is uncertain from the image
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Obsidian with Slate/Tuff
Volcanic glass (SiO2) with associated pyroclastic rock
igneous
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary