Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
Learn about Not A Rock (Man Made Polymer) in the encyclopedia
View all →
Sandstone
Arenite (SiO2 based typically)
sedimentary
Diabase (Dolerite)
Diabase
igneous
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Marine gastropod shell
Calcium-carbonate shell, primarily aragonite; species cannot be determined from the image
fossil
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Basalt
Basalt
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Diorite
Intermediate plutonic igneous rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Granite (plutonic igneous rock)
igneous
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Synthetic material (Plastic/Polymer)
Sandstone
Arenite
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Slate
Slate (Foliated Metamorphic Rock)
metamorphic
Tumbled brown chalcedony (likely jasper or agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
mineral
Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
metamorphic
Fossilized ammonite
Ammonoidea (likely a small, chambered ammonite fossil)
fossil
Sandstone
Arenite (variable SiO2 composition)
sedimentary
Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
sedimentary
Basalt
Basalt
igneous
Banded calcite (likely polished limestone/marble fragment)
Calcite, CaCO₃; probable banded calcitic marble
metamorphic
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Chert (Flint)
SiO2 (Microcrystalline Quartz)
sedimentary
White pebbles (rock material not identifiable from the image)
Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock
sedimentary
Granite Pebble
Felsic intrusive igneous rock
igneous
Pink granite
Coarse-grained felsic intrusive rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Amber (likely rough amber)
Fossilized plant resin; chiefly polymerized terpenoid resin (succinite, when Baltic-type)
gemstone
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Polished brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide coloration and possible breccia fragments
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic