Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Category
Synthetic (Ceramic)
Browse synthetic (ceramic) specimens identified by the Rock Identifier community.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Goethite / Limonite Concretion
Iron Hydroxide Oxide (FeO(OH))
sedimentary
Goldstone
Aventurine Glass (Man-made)
mineral
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Limonite
FeO(OH)·nH2O (Hydrated iron oxide)
mineral
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide, SiC
mineral
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Iron-rich jasper / hematite-bearing breccia
Ferruginous jasper, chiefly microcrystalline SiO₂ with hematite/goethite (Fe₂O₃/FeO(OH)) and possible limonite
sedimentary
Limonite/Hematite Ironstone
Goethite-rich Ironstone (FeO(OH) · nH2O)
sedimentary
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
metamorphic
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Shale
Fissile mudstone (Shale)
sedimentary
Sunstone (Heliolite)
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Non-geological / Man-made textile
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Synthetic / Textile
Faceted blue gemstone, likely blue topaz or synthetic spinel
Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty
gemstone
Parti Sapphire
Corundum (Al2O3)
mineral
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Chert or chalcedony fragment
Microcrystalline quartz (SiO₂), possibly jasper or agate
sedimentary
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
mineral
Plastic Building Toy (Lego-style piece)
Acrylonitrile Butadiene Styrene (ABS)
not a rock/mineral
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Painted Rock
Weathered Sedimentary Rock (Painted)
sedimentary
Painted River Rock
Painted Quartzite or Smooth Siltstone
sedimentary
Rounded iron-rich pebble
Likely hematite/goethite-bearing quartzite or ironstone; exact identification requires testing
mineral
Small tumbled dark stone, possibly basalt or slag
Likely fine-grained basalt; exact identification is uncertain from the photograph
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Ruby / Red Corundum
Al2O3 (Aluminum Oxide with Chromium trace)
gemstone
Clear Quartz crystals on a Matrix base (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)