Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
Silicon
Silicon (Si)
Quartz (Gravel Fragment)
Silicon Dioxide (SiO2)
Smoky quartz
Quartz (SiO₂), smoky variety
Blue Sapphire
Corundum (Al2O3) with iron and titanium impurities
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 primarily)
Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
Basalt
Aphanitic Mafic Igneous Rock
Yellow Sapphire (Corundum)
Corundum (Aluminum Oxide, Al2O3)
Quartz with Iron Staining
Crystalline Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Granite Pegmatite with Tourmaline and Muscovite
Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))
Corundum (Sapphire variant)
Aluminum Oxide (Al2O3)
Staurolite
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
Blue Crackle Quartz (Dyed Fire Agate/Quartz)
Silicon Dioxide (SiO2) with artificial dye treatment
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Hypersthene
(Mg,Fe)SiO3 - Enstatite-Ferrosilite series
Barite Rose
Barium Sulfate (BaSO4)
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
Bauxite (Laterite)
Hydrated aluminum oxides (Al2O3·nH2O)
Corundum (variety Ruby/Sapphire)
Aluminum Oxide (Al2O3)
Asphalt Concrete
Bituminous conglomerate
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
Auriferous Quartz with Pyrite
Gold-bearing Quartz (SiO2 + FeS2 + Au)
Desert Rose
Gypsum or Barite (CaSO4·2H2O or BaSO4)
Quartz with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite or Limonite staining
Quartz Pebble (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
Schist
Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
Sandstone
Arenite
Sandstone
Arenite (Sandstone)
Copper Ore (likely Malachite or Chrysocolla staining)
Copper Secondary Mineral (e.g., Cu2CO3(OH)2)
Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.
SiO2 (Silicon Dioxide)
Wollastonite
Calcium Inosilicate, CaSiO3