Anthropogenic (Man Made Material Processed By Nature)

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Pyrite (on Shale/Matrix)

Iron Disulfide (FeS2)

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Basalt (Porphyritic)

Basalt (Mafic Extrusive Igneous Rock)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Gold Nugget

Native Gold (Au)

Chert Arrowhead (Flint Projectile Point)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Pebble

Silicon Dioxide (SiO2)

Limestone (Cliff Formation)

Limestone (predominantly CaCO3 as calcite)

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

White Marble

Metamorphic Limestone (CaCO3)

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Tumbled blue-dyed stone, likely basalt or blue aventurine

Likely fine-grained basalt (plagioclase and pyroxene), possibly coated or dyed; exact identification requires testing

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)

Banded Calcite or Travertine

Calcium Carbonate (CaCO3)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4

Common Marble

Calcium Carbonate (CaCO3)

Fossilized Shell

Invertebrate fossil (Bivalvia or Brachiopoda)

Fossilized Gastropod Shell

Class Gastropoda (Fossil)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Fossiliferous Limestone

Carbonate sedimentary rock (CaCO3) with bioclasts

Shale

Sedimentary rock composed of clay minerals and quartz

Likely tumbled jasper or iron-stained quartzite

Microcrystalline quartz (SiO₂), possibly quartzite with iron-oxide inclusions

Jasper

Silicon Dioxide (SiO2) - Impure Variety of Chert

Blue Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Granite

Granite (felsic intrusive igneous rock)

Chrysocolla

Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Native Silver

Silver (Ag)

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Red Jasper (Heliotrope family variant)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Sandstone

Arenite (primarily SiO2 with Fe2O3)

Milky Quartz with Hematite/Limonite staining

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)