Man Made Rock (Technosol)

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)

Sandstone

Arenite

Schorl (Black Tourmaline) in Quartz or Feldspar Matrix

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite

Sandstone

Arenite

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Sandstone

Arenite

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within a metamorphic matrix

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Turquoise

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

Quartz Pebble

Silicon Dioxide (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Apache Tears (Obsidian)

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Sandstone

Arenite (composed primarily of SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Jasper-Agate Conglomerate (Potentially Puddingstone)

Jasper-cemented Silicate Aggregate (SiO2)

Granite Cobble

Plutonic Granite

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Amygdaloidal Basalt

Amygdaloidal Basalt

Red Jasper

Jasper (Silicate mineral - SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Apache Tear

Obsidian (Hydrated Silica Rich Volcanic Glass)

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Ironstone (likely siderite or goethite-rich siltstone)

Ferruginous Siltstone

Chert / Jasper

Sedimentary Cryptocrystalline Quartz (SiO2)

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Apache Tear

Obsidian (Hydrated Volcanic Glass) - SiO2 (with impurities)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions

Geode (Unopened)

Silica-rich concretion (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Scoria

Vesicular Basalt / Scoria

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite Pebble

Recrystallized Quartz (SiO2)