Sandstone
Arenite (SiO2 based typically)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (SiO2 based typically)
sedimentary
Red Painted Rock
Artificial Coated Lithic Fragment
sedimentary
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Breccia
Breccia
sedimentary
Amber Inlay Jewelry
Fossilized Resin (C10H16O)
Organic Gemstone (Biogenic)
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Native Copper
Copper (Cu)
mineral
Silver (Native or Alloyed)
Ag (Argentum)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
sedimentary
Sandstone
Arenite
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
mineral
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Sandstone Pebble
Arenite (SiO2 with minor mineral cements)
sedimentary
Vanadinite
Lead Chlorovanadate, Pb5(VO4)3Cl
mineral
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Shungite
Shungite (carbon-rich Precambrian rock)
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Gold
Aurum (Au)
Mineral (Metal)
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Chert (Arrowhead artifact)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Sandstone
Arenite (SiO2 based with mineral cements)
sedimentary
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Polished tree agate (likely)
Chalcedony (microcrystalline SiO₂) with green dendritic/inclusion minerals
mineral
Tektite (Indochinite)
Natural glass (High-silica impact glass)
mineral
Jasper Agate (Carnelian Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Unknown metallic sulfide-bearing rock, possibly chalcopyrite or bornite
Tentative: chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary