Quartz Pebble (with potential iron inclusions)
Silicon Dioxide (SiO2)
mineral
Category
Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)
Browse igneous or metamorphic (base stone); anthropogenic (decoration) specimens identified by the Rock Identifier community.
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Asphalt concrete
Anthropogenic conglomerate
sedimentary
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
metamorphic
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Labradorite
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8)
mineral
Chalcopyrite
CuFeS2
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Citrine
Silicon dioxide (SiO2)
mineral
Sandstone pebble
Sandstone (siliciclastic sedimentary rock)
sedimentary
Zoisite with Hornblende
Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions
metamorphic
Gneiss (with Granite/Pegmatite Vein)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)
metamorphic
Eclipse Stone (Kabamba Jasper)
Rhyolite with Aegirine (NaFe3+Si2O6)
metamorphic
Quartzite with Mica / Gneiss Pebble
Metamorphic Rock (Quartz-Feldspar-Mica aggregate)
metamorphic
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Gneiss
Metamorphic Gneiss
metamorphic
Milky Quartz with Iron Oxide Weathering
Silicon Dioxide (SiO2) with Goethite/Limonite coatings
mineral
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Citrine
Citrine (Silicon Dioxide, SiO2)
mineral
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Moqui Marble
Ironstone Concretion (Goethite/Hematite)
sedimentary
Mixed rock and mineral collection
Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss (River Cobble)
Gneiss
metamorphic
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Citrine
SiO2 (Silicon Dioxide)
mineral
Amethyst
Silicon Dioxide (SiO2)
mineral
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
metamorphic