Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Sandstone (with vugs)
Arenite / Sedimentary Sandstone
sedimentary
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock
sedimentary
Agate in Matrix
Silicon Dioxide (SiO2) within host rock
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Milky Quartz in Shale
Silicon Dioxide (SiO2) in sedimentary host rock
mineral
Concretion (Sandstone)
Sandstone Concretion
sedimentary
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
sedimentary
Weathered sandstone or limestone fragment
Likely quartz-rich sandstone or micritic limestone; exact identification requires testing
sedimentary
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Geode or Concretion
Silica-based Concretion / Quartz Geode
sedimentary
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Ironstone Concretion (Iron Nodule)
Hydrated Iron Oxide Concretion (predominantly Goethite, Α-FeO(OH), and Hematite, Fe2O3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz Arenite)
Sandstone (SiO2 with possible mineral cements)
sedimentary
Siltstone Concretion
Carbonate-cemented Siltstone Concretion
sedimentary
Chert on Volcanic Host Rock
Sedimentary Chert (SiO2) within Basalt or Andesite
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Arenite (with high iron oxide content)
sedimentary
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Amethyst (Geode/Druzy)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz Vein in Siltstone
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
metamorphic
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Agate (Polished Slice)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Sandstone with Quartz Crystal Infill
Quartz-cemented quartz arenite
sedimentary
Red Sandstone
Arenite (Iron-rich)
sedimentary
Sandstone
Arenite (predominantly SiO2 quartz grains)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Jasper in Calcite / Brecciated Jasper
Silicon dioxide with calcium carbonate (SiO2 with CaCO3)
sedimentary
Sandstone (with Quartz veining)
Arenite (primarily SiO2)
sedimentary