Iron Meteorite
Siderite (Iron-Nickel alloy)
Category
Browse man made alloy (metallic) specimens identified by the Rock Identifier community.
Iron Meteorite
Siderite (Iron-Nickel alloy)
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Opalite (a synthetic glass)
Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant
Opalite
Synthetic Opalized Glass (SiO2 + additives)
Sea Glass (specifically Frosted White)
Amorphous Silica (substance: Sodium-calcium silicate glass)
Opalite
Synthetic Glass (Simulated Opal)
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Dyed Agate / Painted Stone
Silicon Dioxide (SiO2) with artificial pigment
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
Native Silver
Silver (elemental Ag)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Green Slag
Anthropogenic Silicate Glass
Native copper nugget
Native copper (Cu)
Beads (likely glass or man-made material)
N/A (artificial material)
Opalite
Man-made Opalized Glass (Synthetic Glass)
Silver (Native Element)
Ag (Native Silver), with minor Copper (Cu)
Cherry Quartz
SiO2 (Silicon Dioxide with iron-rich inclusions/dye)
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
White quartz pebble
Quartz (SiO₂), likely milky quartz
Opalite
Synthetic opalescent glass
Glass
Amorphous Silicon Dioxide (SiO2)
Native Copper
Native Copper (Cu)
Opalite
Synthetic Opalised Glass
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
Red Sandstone or Brick Fragment
Arenite (if sandstone)
Opalite
Synthetic Opalite Glass
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
Iron Meteorite (Candidate)
Iron Meteorite (Siderite)
Native Copper
Native Copper (Cu)
Iron Meteorite (Fragment)
Siderite (Iron-Nickel alloy: Kamacite and Taenite)
Crescent Pebble
Weathered Quartzite or Sandstone Fragment
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Molybdenite in Quartz
Molybdenite (MoS2) with Quartz (SiO2)
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Slag
Metallurgical Slag
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
Obsidian (Blue)
Volcanic Glass (SiO2)
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye