Milky Quartz with Iron Staining
Quartz (Silicon Dioxide) - SiO2
mineral
Category
Sedimentary (Secondary Mineral Formation)
Browse sedimentary (secondary mineral formation) specimens identified by the Rock Identifier community.
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Chert (Jasper / Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Mineral
Turquoise cabochon ring
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions
metamorphic
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Small pale stone, possibly quartz or limestone
Indeterminate from image; likely quartz (SiO₂) or calcite-rich limestone (CaCO₃)
mineral
Uncertain small tan mineral/rock fragment
Indeterminate from image; possibly feldspar-rich rock or calcite
mineral
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Milky Quartz Pebble with Chert
Silicon Dioxide (SiO2)
mineral
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Sandstone with Liesegang Rings
Arenite with secondary Iron oxide (Limonite/Goethite) precipitation
sedimentary
Unidentified light-colored rock or mineral specimen
Indeterminate; possibly weathered calcite-rich material, limestone, or pale quartz-bearing rock
mineral
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Chert (Jasper / Petrified Wood)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Agate (Banded Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
sedimentary
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz on Limestone
Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)
Mineral on Sedimentary
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
mineral
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Limonite with Pyrite
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O
mineral
Quartz in Matrix
Silicon Dioxide (SiO2) in host rock matrix
mineral
Banded Chert (with Quartz Vein)
Microcrystalline Silica (SiO2)
sedimentary
Malachite specimen
Malachite, Cu₂CO₃(OH)₂
mineral
Native Gold Nugget
Native Gold (Au)
mineral
Firewood (Wood Log)
Lignum (Plant tissue composed of cellulose and lignin)
Organic (Non-geological)
Limonite
Limonite (FeOO·nH2O)
mineral
Turquoise (Tumbled/Polished)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Mineral
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral