Man Made Material (Constructed)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Chert (White/Gray variety)

Chert (SiO2)

Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Laterite

Laterite (Iron and aluminum-rich residual rock)

Quartzite

Quartzite (primarily SiO2)

Diorite

Intrusive Igneous Rock (Intermediate Composition)

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Quartzite

Quartzite (primarily SiO2)

Chert (specifically Gray/Black Chert)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Olivine (Peridot in gem form)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Quartzite

Quartzite (mostly SiO2)

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Red Shale

Fissile Siliciclastic Sedimentary Rock

Granite River Pebble

Phaneritic Felsic Igneous Rock (Granite)

Biotite Schist

Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Ferruginous Quartz (Agatized/Iron-stained Quartzite)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Iron-stained)

Chert (SiO2)

Ferruginous Sandstone

Arenite with Iron-Oxide cement (primarily Fe2O3 • nH2O)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Pink Quartzite

Quartzite (primarily SiO2)

Lepidolite (in Quartz Matrix)

Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]

Quartzite

Quartzite (composed primarily of Quartz, SiO2)

Ironstone (likely Limonite or Goethite)

Ferruginous sedimentary rock (FeO(OH)·nH2O)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Ferruginous Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Diorite

Diorite (Intermediate intrusive igneous rock)

Jasper Conglomerate (Puddingstone)

Jasper Conglomerate (Siliceous Sedimentary Rock)

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)

Flesh-toned Siltstone

Siltstone (composed of microscopic Quartz and Feldspar grains)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pyrite

Iron Sulfide (FeS2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Rhodonite

Rhodonite (MnSiO3)