Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Category
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Petrified Wood
Silicified Wood (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Polished copper-bearing mineral specimen, likely malachite-rich copper ore
Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite
Muscovite Mica
Muscovite, KAl2(AlSi3O10)(OH)2
Diamond
Diamond (C)
Granite / Diorite (Granitoid)
Granitoid rock (composed mainly of Quartz, Feldspar, and Amphibole/Biotite)
Tooth or shell fragment (likely fossilized marine material)
Indeterminate; possibly a fossil fish tooth or mollusk shell fragment composed mainly of calcium carbonate (CaCO₃)
Petrified Wood
Silicified Wood (SiO2 / Quartz pseudomorph after wood)
Petrified Wood
Silicified Wood (SiO2)
Sandstone
Clastic sedimentary rock (Quartz arenite / Arkose)
Dinosaur Fossil Tooth
Vertebrate Fossilized Tooth
Fossil Shark Tooth
Chondrichthyes (class)
Fossil Shark Tooth
Selachii (fossilized dentition)
Bivalve Fossil (Fossilized Shell)
Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
Petrified Wood
Silicified Wood (primarily SiO2)
Travertine
Calcium Carbonate (CaCO3)
Jasper and Basalt Pebble
Polymineralic lithic pebble
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Starfish Fossil
Asteroidea fossil
Fossil Shark Tooth
Chondrichthyes tooth fossil
Granite Cobble
Plutonic Igneous Rock (Granitic)
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
Amazonite
Microcline feldspar (KAlSi₃O₈), green variety
Likely tumbled quartz/chalcedony
Quartz (SiO₂), possibly milky quartz or pale chalcedony
Fossilized Brachiopod
Phylum Brachiopoda (likely Order Spiriferida or Orthida)
Sandstone
Arenite
Petrified Wood
Silicified Wood (SiO2)
Quartz-rich metamorphic rock, likely mica schist
Mica schist; chiefly quartz (SiO₂) with biotite/muscovite mica and possible feldspar
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Chert (specifically Yellow/Honey Jasper variety)
Cryptocrystalline Quartz (SiO2)
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
Diamond
Carbon (C)
Diamond (or Diamond Simulant/Cubic Zirconia)
Carbon (C) - if diamond, or Zirconium dioxide (ZrO2) - if Cubic Zirconia
Aragonite Star Cluster
Aragonite (CaCO3)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)