Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Ironstone (likely Ferruginous Siltstone/Sandstone)
Ferruginous sedimentary rock (FeOx-rich clastic)
sedimentary
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amygdaloidal Basalt
Basalt with secondary amygdule minerals (likely Epidote or Chlorite)
igneous
Sandstone (likely Siltstone variety)
Arenite / Siltstone (primary mineral SiO2)
sedimentary
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Ferruginous)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Banded Agate
Chalcedony (SiO2) with impurities
mineral
Mookaite Jasper
Radiolarite (Silicified radiolarian chert)
sedimentary
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Biotite Schist with Garnet
Garnet-Biotite Schist
metamorphic
Yellow Aventurine
Quartz (Silicon Dioxide - SiO2) with inclusions of Mica
Mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Agate (Banded Chalcedony)
Cryptocrystalline Silica (SiO2)
mineral
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
sedimentary
Sandstone (Ferruginous)
Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)
sedimentary
Agate
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian type)
Silicon Dioxide (SiO2)
mineral
Chrysoprase
Chalcedony (cryptocrystalline quartz) with nickel inclusions; SiO2
Mineral
Chalcedony (Botryoidal/Chalcedony Rose)
Silicon Dioxide (SiO2)
mineral
Limonite stained Sandstone
Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon dioxide (SiO2)
sedimentary
Bumblebee Jasper
Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)
mineral
Jasper (Tumbled)
Silicon Dioxide (SiO₂)
sedimentary (cryptocrystalline quartz)
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
mineral
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically tan/pink variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Amygdaloidal Basalt
Basalt with secondary mineral infilling (SiO2/CO3)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Common Opal
Hydrated silica (SiO2 " nH2O)
mineral