Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Simulated Mineral) in the encyclopedia
View all →
Diamond (set in a gold ring)
Carbon (C) - Adamantine cubic carbon
mineral
Diamond
Diamond (C)
mineral
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Yellowish variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Sandstone Cobble
Arenite (Secondary classification based on grain size)
sedimentary
Polished red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Red Tuff / Sandstone
Rhyolitic Tuff / Pyroclastic Volcanic Rock
igneous
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Granite
Felsic intrusive igneous rock
igneous
Iron-stained quartz-bearing rock
Quartz (SiO₂), likely in a limonite/goethite-rich matrix
mineral
Probable serpentinite (serpentine-rich rock)
Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite and olivine remnants
metamorphic
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
metamorphic
Petrified Wood
Silicified wood (principally Silicon Dioxide, SiO2)
sedimentary
Blue-green copper mineral specimen, likely chrysocolla-bearing rock
Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with malachite or chrysocolla matrix
mineral
Greenstone Pebble
Metabasalt / Greenschist
metamorphic
Septarian Nodule
Septarian Concretion (Complex of Calcite, Aragonite, and Limestone/Mudstone)
sedimentary
Porphyritic Basalt (or Porfido / Porphyry Beach Pebble)
Porphyritic Basalt / Andesite
igneous
Tumbled greenish serpentine
Serpentinite; chiefly antigorite/lizardite, Mg₃Si₂O₅(OH)₄
metamorphic
Blue Cat's Eye Quartz (Heated/Dyed)
Silicon Dioxide (SiO2) with fibrous inclusions
mineral
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Quartz with Iron Oxide
Silicon Dioxide (SiO2) with Fe2O3 inclusions
mineral
River Cobble (Quartzite or Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide cement Fe2O3)
sedimentary
Sandstone
Arenite (SiO2 based with quartz grains)
sedimentary
Polished Red Quartz (or Carnelian / Red Jasper)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Limonitic/Arkose)
Sandstone (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Sandstone (Red)
Arenite (SiO2 with Fe2O3)
sedimentary
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
sedimentary
Quartz Crystal Cluster (Pipe-like or Candle Quartz Growth)
Silicon Dioxide (SiO2)
mineral
Tumbled amethyst with possible lepidolite/colored quartz companion
Amethyst, purple quartz (SiO₂), likely with iron-related color centers
mineral