Man Made Rock (Sedimentary Analogue)

Chert (Jasper variety) with Iron Oxide staining

Cryptocrystalline Quartz (SiO2) with Goethite/Limonite impurities

Red Jasper (Chert)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Biotite (Mica)

Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)

Gneiss

High-grade metamorphic rock (Gneiss)

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

Gneiss (Metamorphic Rock)

Gneiss

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Gneiss (Cobble)

Gneiss

Clear Quartz

Silicon Dioxide (SiO2)

Gneiss Pebble

Gneiss

Quartz Crystal (specifically a small Clear Quartz point)

Silicon Dioxide (SiO2)

Jasper (specifically Brecciated or Agated Jasper)

Silicon Dioxide (SiO2) - Chalcedony with impurities

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

River Rock

Fluvial Cobble (typically Quartzite or Sandstone)

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Red Quartz (Carnelian/Red Jasper Agate)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Chert Nodules / Flint

Crystalline Silica (SiO2)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Gneiss (with Quartz and Mica)

Gneiss

Gneiss

High-grade foliated metamorphic rock

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Banded Flint (Polished Stripe Flint)

Silicon Dioxide (SiO2) - variety of Chert

Kambaba Jasper

Stromatolite (Fossilized Algae)

Chert / River Jasper

Microcrystalline Quartz (SiO2)

Jasper and Yellow Chert (Tumbled)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (in Quartz/Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper-Agate Conglomerate (Potentially Puddingstone)

Jasper-cemented Silicate Aggregate (SiO2)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation