Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Metamorphic rock
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
Sedimentary Rock (Quartz Arenite)
sedimentary
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Lapis Lazuli
Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Light-colored limestone (probable fossiliferous or micritic limestone)
Calcite-rich carbonate rock; predominantly CaCO₃ (calcite)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (possibly agate or common quartz)
Microcrystalline quartz, SiO₂
mineral
Diorite (Spotted or Dalmatian Stone effect)
Diorite (Intermediate Plutonic Rock)
igneous
Limonite with Pyrite
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O
mineral
Sandstone (Ferruginous)
Arenite with Iron-Oxide cement
sedimentary
Likely polished dark stone or glassy mineral bead
Indeterminate; possibly obsidian, hematite, or a dark agate
mineral
Sandstone (Weathered Coastal Boulder)
Arenite (composed primarily of SiO2)
sedimentary
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Diorite with Quartz Veins
Diorite
igneous
Red Siltstone
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Siltstone with Sandstone Bands
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Quartzose Sandstone / Lithic Sandstone
sedimentary
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Sandstone
Sedimentary rock composed mainly of quartz sand
sedimentary
Weathered porphyritic pebble
Likely porphyritic volcanic rock, possibly andesite or rhyolite
igneous
Sandstone
Sedimentary Clastic Rock (Quartz arenite)
sedimentary
Basalt (Phaneritic or Diabase)
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Fossilized coral or porous marine limestone
Likely fossil coral (Scleractinia), composed mainly of calcite/aragonite (CaCO₃)
fossil
Granite / Gneiss Ballast Rock
Granite (Quartzo-feldspathic rock)
igneous
Sandstone (Quartzose Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Rounded pink granite pebble
Granite, a coarse-grained felsic intrusive igneous rock composed primarily of quartz, feldspar, and minor mica or amphibole
igneous
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Granite
Granite
igneous
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly weathered chert or chalcedony
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
White quartz geode
Quartz, silicon dioxide (SiO₂), likely a druzy quartz geode
mineral