Sedimentary Rock (Metamorphosed)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Milky Quartz (Druzy Geode fragment)

Silicon Dioxide (SiO2)

Foliated Gneiss (River-Worn Pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Milky Quartz (Crystal Cluster)

Silicon Dioxide (SiO2) - Quartz Variety

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Yellow Agate

Chalcedony (cryptocrystalline Quartz), SiO2

Chalcedony (Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Iron Formation

Banded Iron Formation (BIF)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Jasper (Iron-stained Quartz)

Silicon dioxide (SiO2) with iron oxide inclusions

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Graywacke (Sandstone)

Graywacke Sandstone

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Chert (Yellow or Ochre Jasper variant)

Microcrystalline Quartz (SiO2)

Jasper (Red Jasper with Quartz veins)

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Chert (Jasper-bearing)

Chert (Silicon Dioxide, SiO2)

Chert (Iron-stained)

Chert (SiO2)

Chert (Brecciated or Veined)

Silicon Dioxide (SiO2)

Chert (Iron-rich or Jasperoid)

Cryptocrystalline Quartz (SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)

Coquina (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (CaCO3)

Ammonite Fossil (Polished Half)

Ammonoidea (subclass)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Red Sandstone (Iron-rich)

Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)

Red Jasper (Brecciated or Mottled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Black Veined Jasper (Spiderweb Jasper)

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Sandstone (with Iron Oxide)

Arenite with Limonite/Hematite staining

Chert (Flint variety)

Chert (SiO2)

Honeycomb Coral Fossil

Favosites (extinct genus of tabulate coral)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Chert (Limestone-based)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Gneiss (specifically a Banded Gneiss cobble)

Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Biotite Schist

Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

Gneiss (specifically Pink Gneiss)

Gneiss (high-grade regional metamorphic rock)

Red Jasper

Jasper (SiO2) with Hematite (Fe2O3) inclusions