Mineral, Often Found As A Rock

Chert (White Chert)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint Pebble)

Microcrystalline quartz (SiO2)

Amethyst (Quartz)

Amethyst (SiO2 with iron impurities)

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Green Jasperiod)

Chert (Microcrystalline Quartz, SiO2)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Greenstone Porphyry

Porphyritic Metavolcanic Rock

Chert (variously Flint)

Chert (Microcrystalline or cryptocrystalline Quartz, SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite Pebbles

Quartzite (primarily SiO2)

Sandstone (Painted)

Arenite (primarily SiO2)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Chert (often referred to as Flint or Jasper)

Chalcedony (SiO2) - Silicon Dioxide

Rose Quartz

Quartz (SiO₂), variety Rose Quartz

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Agate

Silicon Dioxide (SiO2) - variety: Chalcedony

Granitic Pegmatite

Pegmatitic Granite

Scoria (Volcanic Rock)

Scoria (often basaltic scoria)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Chert (containing Calcite or Quartz inclusions)

Silicon Dioxide (SiO2) with varying mineral impurities

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

Jadeite and Nephrite (Jade)

Sodium Aluminum Silicate (Jadeite) / Calcium Magnesium Iron Silicate (Nephrite)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone with Quarzite clasts

Arenite (SiO2 based)

Sandstone (Tumbled/River Pebble)

Arenite (composed primarily of SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Quartzite (Nodule)

Quartzite (SiO2)

Chert (Flint nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 oxides)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Lapis Lazuli

Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Yellow Jade (often Serpentine or Dolomite)

Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.