Industrial Byproduct (Anthropogenic Rock Like Material)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Coal

Carbonaceous sedimentary rock

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Sandstone

Arenite (SiO2 primarily)

Botryoidal chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂; chalcedony with possible iron/manganese inclusions

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Sandstone

Arenite (compositionally various, primarily SiO2)

Conglomeratic gravel / polymictic breccia

Polymictic rudite, likely anthropogenic or beach/stream gravel; composition varies

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Sandstone

Arenite (SiO2 based)

Iron-stained quartz-bearing rock fragment

Likely quartz with iron-oxide staining; exact rock type cannot be determined from the image

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Green sea glass (likely bottle glass)

Human-processed soda–lime silicate glass; not a natural mineral or rock

Chert Nodule (Flint)

Microcrystalline Quartz (SiO2)

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Weathered metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz–iron-oxide host

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Basalt

Mafic Igneous Pebble

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Laterite (Iron-rich bauxite or Gossan)

Ferricrete (Fe2O3·nH2O)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Quartzite

Quartzite (primarily SiO2)

Small dark mineral fragment, possibly mica or a metallic sulfide

Unidentified from image; possible biotite mica or iron sulfide (pyrite-group)

Dalmatian jasper (often sold as Dalmatian stone)

Porphyritic alkali feldspar–quartz syenite, commonly with black arfvedsonite/aegirine-group amphibole inclusions

Granitoid (Granitic Rock)

Granitoid (Quartzo-feldspathic plutonic rock)

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Limestone

Calcium Carbonate (CaCO3)

Silicified oyster fossil

Fossil oyster shell, commonly Ostrea or Crassostrea, replaced or encrusted by chalcedony/quartz

Sulfur

Native Sulfur (S)

Sulfur (with Matrix)

Native Sulfur (S8)

Sandstone (Pebble)

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Mudstone

Lutylite (group of fine-grained sedimentary rocks)

Possible basalt or iron-rich slag

Basalt (tentative; identification uncertain from image)

Sandstone (with Iron Staining)

Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)

Sandstone

Arenite (SiO2 principal)

Sandstone

Arenite (primarily SiO2)

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix