Mineral Within Sedimentary Rock

Turquoise

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

Yellow Jasper / Chalcedony

Silicon Dioxide (SiO2) with iron inclusions

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Ferruginous Quartz (Red Quartz)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Sandstone

Arenite (primarily Quartz, SiO2)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Banded Gneiss Pebble

Banded Gneiss

Chert (White Chert/Flint)

Microcrystalline Quartz (SiO2)

Turquoise

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

Gneiss

Gneiss (Foliated Metamorphic Rock)

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Gneiss

Gneiss (Foliated Metamorphic Rock)

Ironstone Nodules (Limonite/Hematite)

Goethite/Hematite mix (FeO(OH)/Fe2O3)

Quartz Geode

Silicon Dioxide (SiO2)

Gneiss

Gneissic Metamorphic Rock

Jasper and Quartz Breccia

Silicified Breccia / Microcrystalline Quartz with Iron Oxide

Druzy Quartz on Matrix

Silicon Dioxide (SiO2) on host rock

Gneiss

Gneiss (SiO2-rich metamorphic rock)

Biotite Gneiss

Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)

Banded Quartz

Silicon Dioxide (SiO2)

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Quartz (Sunstone-like Chalcedony)

Silicon Dioxide (SiO2)

Dyed Agate Slice

Silicon Dioxide (SiO2)

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

Sandstone (River Pebble)

Arenite (primarily SiO2)

Quartz Vein in Basalt or Sedimentary Host Rock

Silica-veined lithic fragment (SiO2 in host matrix)

Banded Agate (Tumbled)

Cryptocrystalline Quartz (SiO2)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (Fe2O3 staining)

Garnet in Schist

Almandine Garnet in Mica-Schist (Fe3Al2(SiO4)3)

Unopened Geode

Geode (containing various mineralization like Quartz SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (potentially Flint or Mudstone)

Microcrystalline Quartz (SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Druzy Quartz Geode

Silicon Dioxide (SiO2)