Organic (Geological Relative)

Basalt

Basalt

Quartzite

Quartzite (SiO2)

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Diorite

Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)

Chert (variant of Flint)

Chert (SiO2)

Chert (Jasper/Common Chert)

Microcrystalline Quartz (SiO2)

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Serpentinite

Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)

Mookaite (Mookaite Jasper)

Silicified Radiolarite (SiO2 with iron oxides)

Basalt with Desert Varnish

Mafic Igneous Rock with Ferromanganese Coating

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Marble

Recrystallized Carbonate Rock (CaCO3)

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock

Quartzite

Quartzite (primarily SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Quartzite

Quartzite (SiO2)

Halite (Rock Salt)

Halite; NaCl (Sodium Chloride)

Laterite

Laterite (no specific mineral formula as it's a rock type)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Chert (Flint)

Chert (microcrystalline quartz)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Obsidian (likely Golden Sheen Obsidian or Rainbow Obsidian, given the subtle sheen visible on some beads)

Obsidian (volcanic glass, predominantly SiO2 with various impurities)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Chert (Nodule)

Microcrystalline Silica (SiO2)

Granite

Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)

Quartz with Mica/Chlorite inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Chert (or Flint)

SiO2 (predominantly microcrystalline quartz)

Limestone (Cliff Formation)

Limestone (predominantly CaCO3 as calcite)

Chert

Silicon dioxide (SiO2)

Granite

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

Granite

Granite (a felsic intrusive igneous rock)

Granite

Granite (felsic intrusive igneous rock)

Chert

Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)

Chert

Chert (microcrystalline quartz, SiO2)

Granite

Granite (a plutonic igneous rock)

Granite

Granite (a common rock type, not a single mineral species)

Chert (or Flint)

Chert (microcrystalline or cryptocrystalline quartz, SiO2)

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)