Blue crystal pendant (likely blue glass or synthetic crystal)
Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral
gemstone
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Basalt with Red Sandstone
Mafic extrusive igneous rock with quartzose sedimentary matrix
igneous
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
metamorphic
Sandstone
Arenite (predominantly SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
mineral
River Pebble (Granitic / Quartzite Pebble)
Quartz-Feldspar Aggregate (SiO2 / KAlSi3O8)
igneous
![Decorated turquoise-like bead or mineral pendant (Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper) — mineral](https://media.rock.id/decorated-turquoise-like-bead-or-mineral-b647b395-b8eb-458f-b55c-26fa22e744b1-thumbnail.jpg)
Decorated turquoise-like bead or mineral pendant
Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper
mineral
Stamped concrete made to resemble flagstone
Portland-cement concrete with decorative stone-textured finish
sedimentary
Sandstone (Pebble)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Technogenic / Anthropogenic Pavement Material
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Unidentified polished mineral fragment
Likely quartz-bearing stone; exact identification is impossible from the blurred photograph
mineral
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Unknown Tumbled Stone
Unknown (Too Blurry)
mineral
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Opal (in Jewelry Setting)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone
Copper Composite Turquoise (Purple and Blue)
Composite Hydrous copper aluminum phosphate with bronze/copper matrix binding
gemstone
Rounded pebble with a brown mineral or rock inclusion
Unidentified lithic pebble; the pale matrix and brown patch cannot be identified reliably from the image
sedimentary
Generic Rock Fragment
Rock Fragment
sedimentary
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
sedimentary
Coarse Sandstone
Arenite (SiO2 based)
sedimentary
Connemara Marble
Calcitic Marble / Serpentinite composite
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
mineral