Unakite
Altered Granite (Granitic Metamorphic Rock)
Category
Browse man made metamorphic style composite specimens identified by the Rock Identifier community.
Unakite
Altered Granite (Granitic Metamorphic Rock)
Polished tiger iron
Tiger iron; interlayered hematite–jasper–crocidolite/quartz rock
Goldstone (aventurine glass)
Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)
Quartz-rich gravel fragment
Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions
Red garnet cabochon-style earrings
Likely almandine garnet (Fe₃Al₂(SiO₄)₃); the image alone cannot confirm the stone or whether it is natural or synthetic.
Unakite
Unakite (Epidotized Granite)
Smoky Quartz
Silicon Dioxide (SiO2)
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
Soapstone (Talc-Schist)
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
Red garnet-like faceted pendant
Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from the image
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Concrete aggregate surface
Human-made cementitious composite; primarily calcium-silicate-hydrate cement with mixed silicate aggregate
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Goldstone (likely red/brown aventurine glass)
Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)
Dyed or synthetic turquoise-blue glass-like specimen
Likely man-made colored glass or resin; exact identification requires testing
Blue goldstone
Man-made aventurine glass containing metallic copper particles; not a natural mineral
Likely polished quartz or glass-like mineral cabochon
Probably quartz (SiO₂), though the image cannot exclude man-made glass
Polished black-and-golden tourmaline
Schorl–dravite tourmaline, commonly represented by black schorl over brown dravite
Possible sea glass (naturally frosted glass), not a confirmed geological specimen
Man-made silicate glass; composition varies, commonly soda-lime glass
Blue glassy mineral specimen, possibly dyed or synthetic
Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass
Carved Stone Turtle
Carved Soapstone and Quartz
Pink/red faceted gemstone, likely synthetic ruby or pink sapphire
Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material
Orange Aventurine (Sunstone-style Quartzite)
Silicon Dioxide (SiO2) with Goethite or Hematite inclusions
Unakite
Altered granite (Epidote, Orthoclase Feldspar, and Quartz)
Marble (Carrara Marble style)
Recrystallized Calcite (CaCO3)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Marble (Sculpted Statue)
Metamorphic Limestone (composed primarily of Calcite, CaCO3)
Black beaded bracelet, likely black onyx or glass
Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass
Quartzite
Quartzite (primarily SiO2)
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
Likely muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
Hematite Beads
Hematite (Fe2O3)
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)