Mineral, Often Found In Sedimentary Deposits

Black Jasper (Black Stone / River Pebble)

Silicon Dioxide (SiO₂), Opaque variety of Chalcedony

Conglomerate

Conglomerate rock

Shale creek bed

Shale (fine-grained clastic sedimentary rock)

Yellow Quartz (Citrine Quartz or Yellow Chalcedony)

Silicon Dioxide (SiO2)

Red Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Ironstone (Limonitic Concretion)

Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions

Basalt with Caliche Crust

Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

Chrysoprase

Silicon Dioxide (Nickel-bearing Chalcedony) - SiO2

Blue Chalcedony

Silicon Dioxide (SiO2)

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Mookaite Jasper

Silicon Dioxide (SiO2) - variety of Chert/Jasper

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

Chert (Flint)

Microcrystalline Quartz (SiO2)

Red Jasper

Jasper (Silicate mineral - SiO2)

Arsenopyrite with Quartz

Arsenopyrite (FeAsS)

Siltstone with iron staining

Siltstone (primarily SiO2 with FeO(OH) coatings)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Limestone (specifically Travertine or Tufa)

Calcium Carbonate (CaCO3)

Chert (and/or River Pebble)

Microcrystalline silica (SiO2)

Sandstone

Arenite (SiO2 based)

Common Opal (Green Opal / Pistachio Opal)

Hydrated silica (SiO2·nH2O)

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (Basanite variety)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Siltstone

Siltstone (siliciclastic sedimentary rock)

Glauconitic Sandstone (Greensand)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Iron Ore / Ironstone Concretion

Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Jasper, Agate, Quartz Mix (Polished Beads)

SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

Red Jasper

Silicon Dioxide with Iron inclusions (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Quartzite (River Stone)

Quartzite (mainly SiO2 with iron oxide staining)