Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Category
Mineral (Processed Alloy)
Browse mineral (processed alloy) specimens identified by the Rock Identifier community.
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Gold (Processed)
Gold (Au)
Metal (Elemental Mineral)
Native Copper
Native Copper (Cu)
mineral
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Heat-Treated Citrine (Amethyst-based)
Quartz (Silicon Dioxide) - SiO2
mineral
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Native Copper
Native Copper (Cu)
mineral
Diamond in Gold Setting
Diamond (C - pure carbon)
mineral
Popcorn
Zea mays everta (P. Wilson) (Botanical name for the corn variety)
Organic/Biogenic
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
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2(SiO3)6) with chromium/vanadium traces
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron traces)
mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Shale with Plant Fossils / Carbonaceous Shale
Laminated Mudrock (Siliciclastic)
sedimentary
Jasper with Iron Staining
Silicon Dioxide (SiO2) with impurities
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Pallasite Meteorite
Pallasite (ST-class)
mineral
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁₈)
mineral
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
mineral
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
sedimentary
Arsenopyrite
Arsenopyrite (FeAsS)
mineral
Native Copper
Native Copper (Cu)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Native Copper (in coinage alloy)
Copper (Cu)
mineral
Granite (White Granite variant)
Phaneritic Plutonic Rock (High-silica Felsic)
igneous
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Silver (Native Element)
Ag (Native Silver), with minor Copper (Cu)
mineral
Slate
Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous