Rock Identifier

Category

Sedimentary (Secondary Mineral Formation)

Browse sedimentary (secondary mineral formation) specimens identified by the Rock Identifier community.

Red Coral (with Hematite and Black Pearl accents) (Corallium rubrum (Calcium Carbonate, CaCO3)) — mineral

Red Coral (with Hematite and Black Pearl accents)

Corallium rubrum (Calcium Carbonate, CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz Sphere (Silicon Dioxide (SiO2)) — mineral

White Quartz Sphere

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2) with Limonite/Goethite) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Goethite

Vanadinite (Vanadinite [Pb5(VO4)3Cl]) — mineral

Vanadinite

Vanadinite [Pb5(VO4)3Cl]

Crystalline Quartz (Rough) (Quartz (Silicon Dioxide, SiO2)) — mineral

Crystalline Quartz (Rough)

Quartz (Silicon Dioxide, SiO2)

Chert (specifically Flint or Common Opal/Chalcedony mix) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Common Opal/Chalcedony mix)

Microcrystalline Quartz (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Copper-bearing Quartz (with Malachite and Iron Oxides) (Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)) — Mineral Specimen

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Mineral Specimen

Iron-stained Quartz (Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)) — mineral

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)

Larimar (Blue Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Eye Agate (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Eye Agate

Silicon Dioxide (SiO2) - Banded Chalcedony

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Turquoise (likely stabilized or Howlite/Magnesite imitation) (Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (likely stabilized or Howlite/Magnesite imitation)

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

Green Apophyllite on Stilbite (Fluorapophyllite-(K) [(KCa4Si8O20F)·8H2O] and Stilbite [NaCa4(Si27Al9)O72·28H2O]) — mineral

Green Apophyllite on Stilbite

Fluorapophyllite-(K) [(KCa4Si8O20F)·8H2O] and Stilbite [NaCa4(Si27Al9)O72·28H2O]

Ferruginous Quartz (SiO2 (Silicon Dioxide) with Iron Oxide inclusions (FeO(OH) / Fe2O3)) — mineral

Ferruginous Quartz

SiO2 (Silicon Dioxide) with Iron Oxide inclusions (FeO(OH) / Fe2O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Malachite (Malachite (Cu2CO3(OH)2)) — mineral

Malachite

Malachite (Cu2CO3(OH)2)

Chlorastrolite (Isle Royale Greenstone) (Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)) — mineral

Chlorastrolite (Isle Royale Greenstone)

Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)

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

Turquoise

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

Quartz (Milky/Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Diamond (Diamond (pure carbon, C)) — mineral

Diamond

Diamond (pure carbon, C)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone with Quartz Veining (Arenite with hydrothermal quartz (SiO2)) — sedimentary

Sandstone with Quartz Veining

Arenite with hydrothermal quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Red Sandstone (Arenite (primarily Quartz and Feldspar with Iron Oxide cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz and Feldspar with Iron Oxide cement)

Blue Lace Agate (Chalcedony (a form of Quartz) - SiO2) — Mineral

Blue Lace Agate

Chalcedony (a form of Quartz) - SiO2

Quartz (Vein Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite (FeS2)) — Mineral

Pyrite

Iron Pyrite (FeS2)

Red Shale (Lutite (primarily composed of clay minerals and iron oxides like hematite, Fe2O3)) — sedimentary

Red Shale

Lutite (primarily composed of clay minerals and iron oxides like hematite, Fe2O3)

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz)

Rose Quartz (Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Chert (often called Flint in various colors) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint in various colors)

Silicon Dioxide (SiO2)

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Ferruginous Oxides) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferruginous Oxides

Tanzanite (Blue/Violet Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))) — mineral

Tanzanite

Blue/Violet Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))

Larimar (Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Pectolite (NaCa2Si3O8(OH))

Moss Agate (Silicon dioxide (SiO2) with inclusions of hornblende or chlorite) — mineral

Moss Agate

Silicon dioxide (SiO2) with inclusions of hornblende or chlorite

Sandstone (Greywacke) (Sandstone (SiO2 enriched with lithic fragments)) — sedimentary

Sandstone (Greywacke)

Sandstone (SiO2 enriched with lithic fragments)

Shale or Mudstone (Based on appearance) (Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)) — Sedimentary

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)