Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (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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Fluorite
Calcium fluoride (CaF2)
mineral
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Sandstone
Arenite
Sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper with Quartz vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Native Copper Nugget
Native Copper (Cu)
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone with Brachiopods
Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)
sedimentary
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
mineral
Slate
Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)
metamorphic
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
River Cobble (likely Basalt or Chert)
Siliceous River Rock / Microcrystalline Quartz / Mafic Igneous
igneous/sedimentary
Ferruginous Breccia
Breccia with Iron-rich (Hematite/Goethite) Matrix
sedimentary
Quartz
Quartz (SiO2)
Mineral
Fossiliferous Limestone
Carbonate sedimentary rock (CaCO3) with bioclasts
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Botryoidal or Chalcedony Rose)
Silicon dioxide (SiO2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Crocidolite (SiO2 with iron oxides)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz River Pebbles
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Chert Breccia (with Iron Staining)
Microcrystalline Quartz (SiO2) with iron oxides (Limonite/Goethite)
sedimentary
Chert
Chert (SiO2)
sedimentary
Hag Stone
Naturally holed stone (typically sedimentary rock such as flint, limestone, or sandstone)
Sedimentary
Hematite Nodules (Moqui Marbles style)
Iron Oxide (Fe2O3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral