Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Category
Mineral (Processed Alloy)
Browse mineral (processed alloy) specimens identified by the Rock Identifier community.
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Tumbled blue glassy mineral, possibly sodalite or blue aventurine
Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material
mineral
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Heat-Treated Citrine (Amethyst-based)
Quartz (Silicon Dioxide) - SiO2
mineral
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Mixed rock and mineral collection
Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials
mineral
Sandstone (with Iron Staining)
Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)
sedimentary
Green glass-like cabochon, likely synthetic glass or resin
Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin
gemstone
Quartz Sand (Beach Sand)
Silicon Dioxide (SiO2)
sedimentary
Green glassy slag or manufactured glass bead
Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral
mineral
Celestine (Celestite)
Celestine (Strontium Sulfate, SrSO4)
mineral
Lepidolite in Quartz Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Diamond in Gold Setting
Diamond (C - pure carbon)
mineral
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Tumbled milky quartz
Quartz (SiO₂), microcrystalline or massive variety
mineral
Likely hematite-rich ironstone or metallic mineral fragment
Hematite (Fe₂O₃), possibly with magnetite (Fe₃O₄) or metallic iron
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Biotite Granite
Phaneritic Felsic Igneous Rock
igneous
Carved serpentine wing sculpture
Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4
metamorphic
Native Copper
Native Copper (Cu)
mineral
Shale with Quartz Veins
Fissile Sedimentary Rock (SiO2)
sedimentary
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Pallasite Meteorite
Pallasite (ST-class)
mineral
Iron Meteorite
Siderite (Iron-Nickel Alloy)
mineral
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Granite
Phaneritic Plutonic Felsic Rock
igneous
Copper Ore
Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)
mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Copper Nugget
Native Copper (Cu)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Iron Meteorite
Siderite (Iron-Nickel Alloy)
mineral
Vanadinite
Pb5(VO4)3Cl
mineral
Tumbled black-and-white stone, likely dendritic agate or jasper
Cryptocrystalline quartz (SiO₂), possibly chalcedony with manganese-oxide dendrites
mineral
Dyed mineral cluster, likely calcite or aragonite
Calcite (CaCO₃) or aragonite (CaCO₃), artificially color-enhanced
mineral
Likely tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), potentially hematite/goethite-bearing
mineral