Concrete Fragment
Hardened Portland cement and mineral aggregate
sedimentary (anthropogenic)
Category
Man Made Object (Ring)
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Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Sea Glass
Man-made silicate glass
gemstone
Opalite
Man-made opalescent glass
gemstone
Goldstone
Aventurine Glass (Man-made)
mineral
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Asphalt Concrete
Bituminous conglomerate
sedimentary
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
mineraloid
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
mineral
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Concrete
Anthropogenic Conglomerate
sedimentary
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Unidentifiable Rock Fragment
Uncertain
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
mineral
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Opalite
Synthetic Glass (Silica-based)
gemstone
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Mineraloid (Man-made)
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
mineral
Diamond
Carbon (C)
mineral
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (color due to lead)
mineral
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
mineraloid
Diamond (as set in a gold ring)
Carbon (C)
mineral
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Opalite
Synthetic Glass (Simulated Opal)
gemstone