Man Made Material (Anthro Lithic Product)

Quartzite Cobble

Quartzite (SiO2)

Turquoise, Pearl, and Coral Necklace

CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (Quartz, Chalcedony, or Opal)

Fossil Coral

Scleractinia (Anthos), primarily Calcium Carbonate (CaCO3)

Citrine

Silicon dioxide (SiO2)

Chert

Chert (Microcrystalline Silica, SiO2)

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

Granite

Phaneritic Intrusive Igneous Rock (primarily composed of SiO2, Al2O3, K2O, Na2O)

Green Fluorite in Host Rock

Fluorite (Calcium Fluoride, CaF2)

River Quartzite Spheroid

Recrystallized Orthoquartzite (SiO2)

Serpentine

Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Diamond (or Cubic Zirconia imitation)

Carbon (C) - Native Element

Peridotite (Pyroxenite/Serpentinized Dunite)

Ultramafic Rock (consisting primarily of Olivine and Pyroxene)

Diamond

Diamond (Pure Carbon, C)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Sandstone

Arenite (composed primarily of Quartz: SiO2)

Stichtite in Serpentine (Atlantisite)

Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)

Red Sandstone

Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)

Iron Meteorite

Iron-nickel alloy (e.g., Kamacite, Taenite)

Pink Quartz (Rose Quartz)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Coquina / Fossiliferous Limestone

Fossiliferous Calcarenite (Calcium carbonate, CaCO3)

Olivine (often within Peridotite)

Magnesium iron silicate, (Mg,Fe)2SiO4

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Chert (with Manganese Dendrites)

Chert (Cryptocrystalline Quartz, SiO2)

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Jasper with Manganese Dendrites

Silicon Dioxide (SiO2) with Oxide Mineral Inclusions

Dendritic Agate (Tree Agate)

Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions

Granite

Granite (Felsic Plutonic Rock)

Petrified Wood

Silicified Wood (primarily SiO₂)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Chert (Light Grey / Flint variant)

Cryptocrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Rough Diamond

Diamond (Native Carbon), C

Diamond (Princess Cut)

Carbon (C)

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2)