Organic Materia (Not A Rock Or Mineral)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Glauconitic Sandstone (or Greensand)

Glauconitic Siliciclastic Rock (Containing (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Schist

Mica Schist (Medium-grade Metamorphic Rock)

Serpentinite

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

Sandstone (Ferruginous)

Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Chert (Nodule)

Silicon Dioxide (SiO2)

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Basalt with Scoria

Amygdaloidal Basalt / Vesicular Basalt

Agate

Agate (Silicon Dioxide, SiO2)

Turquoise in Matrix

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

Sandstone (Banded)

Clastic sedimentary rock (primarily SiO2)

Quartz Vein in Gneiss or Basalt

Milky Quartz (SiO2) within Metamorphic Host Rock

Red Jasper

Silicon Dioxide (SiO2)

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Chert (variations include Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

Unidentified Rock Fragment

Unknown

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Gold-bearing Quartz with Iron Oxides

Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Paper (Cellulose)

Cellulose (C6H10O5)n

Garnet Schist

Almandine-Muscovite Schist

Chert (and its variety Flint)

Silicon Dioxide (SiO2) - Microcrystalline or cryptocrystalline Quartz

Fluorite with Quartz coating

Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Graphite

Graphite (C)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Chert (and Fossilized Brachiopod shell)

Sedimentary Cryptocrystalline Quartz (SiO2)

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Granite

Intrusive Felsic Igneous Rock

Agate

Silicon Dioxide (SiO2)

Mexican Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Banded Gneiss

Gneiss (Metamorphic Rock)

Sandstone

Clastic sedimentary rock (primarily SiO2)