Man Made Glass (Not A Natural Rock Or Mineral)

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain

Sandstone Concretion

Clastic Sedimentary Rock (primarily SiO2 with mineral cement)

Sandstone

Arenite (with iron oxide cement)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Diamond

Carbon (C)

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Hematite Beads

Hematite (Fe2O3)

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Goldstone (Red)

Aventurine Glass

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Unidentified gray metallic object

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

Aluminum Slag

Anthropogenic Aluminum (Al)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Natural Pearl

Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Brick veneer, likely manufactured from clay-rich shale

Fired clay brick; chiefly aluminosilicate minerals, commonly mullite and glassy silicate phases after firing

Sandstone

Arenite (composed primarily of SiO2)

Amber-set ring

Amber (fossilized plant resin; organic mineraloid), set in a metal ring

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Conglomerate

Conglomerate Rock (Paraconglomerate)

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Sandstone (likely Fossiliferous)

Arenite / Fossiliferous Sandstone (SiO2 composition)