Mineral On Sedimentary Rock

Chert (River Pebble)

Microcrystalline silicon dioxide (SiO2)

Chert (Iron-Stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Gold (Elemental Metal)

Gold (Au)

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Chert (Flint Nodules)

Cryptocrystalline Quartz (SiO2)

Hag Stone

Perforated Chert (Microcrystalline Silica, SiO2)

Greywhacke (River Pebble)

Graywacke (immature sandstone)

Laterite

Laterite (Iron and aluminum-rich residual rock)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Quartz Vein in Host Rock (Pebble)

Quartz (SiO2) with sandstone or siltstone matrix

Banded Chert with Quartz Veining

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Green Jasper (with Quartz veining)

Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2

Chert (with Chalky Cortex)

Silicon Dioxide (SiO2)

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

Limestone

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with iron oxide inclusions

Oolitic Chert

Silicon Dioxide (SiO2) with oolitic texture

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Granite

Phaneritic Felsic Igneous Rock (Main minerals: SiO2, KAlSi3O8, NaAlSi3O8)

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.

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Hypersthene

Hypersthene (formula: (Mg,Fe)SiO3)

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Chert Pebble Map

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Red Jasper with Quartz and Hematite

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Riverstone Jasper (Chalcedony)

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2)

Banded Calcite (Cave Onyx)

Calcium Carbonate (CaCO3)