Man Made Material, Not A Natural Rock Or Mineral Specimen

Aura Quartz (Titanium/Gold coated)

Silicon Dioxide (SiO2) with metallic vapor deposition

Blue Goldstone

Goldstone (artificial glass)

Opalite

Synthetic glass / Opaque silicious glass

Concrete or asphalt-like aggregate surface with a dark fragment

Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock

Carved Stone Turtle

Carved Soapstone and Quartz

Polished black stone, likely black obsidian

Volcanic glass; predominantly rhyolitic silica glass (SiO₂-rich)

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Opalite

Synthetic Opalised Glass

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Concrete rubble

Anthropogenic conglomerate

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Ironstone Concretion (Pot Stone)

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Opalite (Man-made Glass)

Synthetic Opalised Glass

Aura Quartz Geodes (Lab-Altered)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Diamond

Native Carbon (C)

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Polished stone sphere, possibly agate or jasper

Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Opalite

Synthetic Opalised Glass

Banded Sandstone

Arenite with Liesegang banding

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Diamond

Carbon (C)

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives