Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
View all →
Clear Quartz
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Calcite crystal cluster
Calcite (calcium carbonate, CaCO₃), likely honey or pale-orange calcite
mineral
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Clear quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Polished banded iron formation (BIF)
Banded iron formation; chiefly hematite/magnetite and microcrystalline quartz (chert), with iron silicates
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Jasper with Quartz
Silicon dioxide (SiO2)
mineral
Quartz Geode
Silicon dioxide (SiO2)
sedimentary
Quartz (Microcrystalline variety)
Silicon Dioxide (SiO2)
mineral
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Geode (Calcite or Quartz)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Moqui Marble (Sandstone Concretion)
Hematite-cemented Sandstone (Fe2O3 + SiO2)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Calcite)
sedimentary
Dyed Blue Agate Slice
Chalcedony (Silicon Dioxide, SiO2)
mineral
Weathered iron-rich rock, possibly limonite-bearing sandstone
Limonite/goethite-bearing sandstone or ferruginous conglomeratic rock
sedimentary
Flint Nodule with Chalk Cortex
Chert (Microcrystalline Quartz) SiO2
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Aragonite (Flos Ferri)
Calcium Carbonate (CaCO3)
mineral
Ironstone concretion (likely limonite/goethite-rich)
Iron-oxide-cemented sediment, commonly goethite (FeO(OH)) and/or limonite
sedimentary
Baryte (Barite)
Barium sulfate (BaSO4)
mineral
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Dyed Agate Geode
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Tumbled dark sulfide-rich mineral specimen (possibly pyrite/marcasite)
Tentatively iron disulfide, FeS₂; exact identification requires testing
mineral
Iron-rich concretion or weathered ironstone pebble
Goethite–hematite-bearing limonite concretion (tentative)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Field Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Moqui Marble (Shaman Stone)
Ironstone Concretion (Goethite/Hematite Shell)
sedimentary