Man Made Rock Like Material

Fossilized Shark Tooth (Eroded)

Carcharodon sp. or Otodus sp. fragment (likely)

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt

Basalt

Sandstone

Clastic Sedimentary Rock

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Vesicular Basalt (or Scoria)

Vesicular Basalt

Chert (Flint)

Silicon Dioxide (SiO2)

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Granite

Phaneritic plutonic felsic rock

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Unakite

Altered Granite (Epidotized Granite)

Green Quartzite

Metamorphic Quartzite (often colored by chromium-bearing minerals or fuchsite)

Chert (and/or Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Granite

Granite (Silicic Intrusive Igneous Rock)

Granodiorite

Intrusive Igneous Rock

Sunstone (Aventurine Feldspar)

(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3

Likely weathered iron-rich rock or slag fragment

Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)

Chert (Flint)

Microcrystalline Silica (SiO2)

Chert (Green Chert or Jasper)

Microcrystalline Quartz (SiO2)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Chert (often called Flint or Jasper if reddish)

Microcrystalline Quartz (SiO2)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Sandstone

Arenite (SiO2 based typically)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Granite (plutonic igneous rock)

Granite

Phaneritic Felsic Intrusive Igneous Rock

Pink Granite (Alkali-feldspar Granite)

Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Granite

Granite (Phaneritic Quartz-Feldspar intrusive rock)

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Quartzite

Metamorphic Quartzite (SiO2)

Chert

Microcrystalline Silicon Dioxide (SiO2)

Chert / Flint

Silicon Dioxide (SiO2)

Diabase (Dolerite)

Diabase

Chert / Flint

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Chert (Flint / Quartz Nodule)

Microcrystalline Quartz (SiO2)

Chert (often called Flint)

Chert (Microcrystalline or cryptocrystalline Silica, SiO2)

Limestone

Sedimentary Rock (Primarily CaCO3)