Man Made Rock Like Material

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Red Sandstone (Iron-rich Sandstone)

Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement

Chert / Pink Flint

Cryptocrystalline Quartz (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ferruginous Sandstone (Ironstone)

Arenite with Limonite/Goethite cement

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Petrified Wood (Silicified Wood)

Silicified Wood / Silicon Dioxide (SiO2)

Granite Pebble (Salt and Pepper Granite)

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)

Granite

Granite (Phaneritic intrusive igneous rock)

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Granite / Gneiss Complex

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

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Caliche (with Lichen Cover)

Calcium carbonate-cemented soil layer (CaCO3)

Schist with Quartz/Mica

Mica Schist (primarily Muscovite and Quartz)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)

Chert (Yellow Jasper/Quartzite Pebble)

Microcrystalline Silicon Dioxide (SiO2)

Banded Chert (River Siltstone)

Microcrystalline Quartz (SiO2)

Red Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)

Basalt

Basalt (Fine-grained extrusive igneous rock)

Sandstone (Greywacke/Lithic Sandstone)

Arenite / Lithic Sandstone

Crushed Granite Gravel

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

Black Marble

Recrystallized Carbonate Rock (CaCO3)

Schist

Crystalline Metamorphic Rock (Schistose)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Sandstone (Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Chert (Yellow/Brown variety)

Chert (SiO2)

Red Chert (Jasper)

Silicon Dioxide (SiO2)

River Rock (Quartzite/Chert conglomerate)

Quartzite (SiO2)

Feldspar Granodiorite

Granodiorite (Na,Ca)(Si,Al)4O8