Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
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Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Engineerged Quartz (Quartz Composite)
SiO2 (Silicon Dioxide) in a polymer resin matrix
mineral
Acrylic or Resin (Synthetic Imitation)
Polymethyl Methacrylate (PMMA) or Polyepoxide
Synthetic/Man-made Polymer
Rough White Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
N/A - Non-Geological Item
not a rock/mineral
Hematite Nodule
Hematite (Alpha Fe2O3)
mineral
Limonite / Brown Iron Ore
Hydrous Iron Oxide (FeO(OH)·nH2O)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide - NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH
mineral
Hematite
Hematite (Fe2O3)
mineral
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Rounded pebble, likely quartz-rich river stone
Indeterminate quartz-feldspar-rich lithology; possibly weathered granite or quartzite
igneous
Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Synthetic (Man-made Glass)
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Iron Slag (Industrial Byproduct)
Anthropogenic pyrometallurgical residue
mineral
Orange calcite
Calcite (CaCO₃)
mineral
Likely yellow calcite
Calcite (CaCO₃)
mineral
Pumice
Vesicular Felsic Extrusive Igneous Rock
igneous
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Likely iron-rich rock or weathered metallic mineral fragment
Uncertain; possibly limonite/goethite or iron-bearing slag
mineral
Wollastonite
Calcium Inosilicate, CaSiO3
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Pumice
Pumicite (Volcanic glass with vesicular texture)
igneous
Mica Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 / SiO2)
metamorphic
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Synthetic / Composite Material
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Blue slag-like mineral specimen, possibly bornite or chalcopyrite
Tentatively bornite (Cu5FeS4) or iridescent chalcopyrite (CuFeS2)
mineral
Native Copper
Copper (Cu)
mineral
Vesicular Basalt (or Scoria)
Extrusive mafic igneous rock
igneous
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Copper-bearing rock, possibly native copper in a weathered matrix
Likely copper minerals such as malachite (Cu₂CO₃(OH)₂) in an iron-rich host; exact identification is uncertain from the image
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Likely milky quartz pebble
Quartz (SiO₂), crystalline silica
mineral
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Copper slag or vesicular basalt with copper minerals
Industrial slag / Basaltic matrix with secondary copper minerals
igneous
Epidote
Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))
metamorphic
Hematite
Iron Oxide (Fe2O3)
mineral