Green Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
sedimentary
Mammoth or Mastodon Tooth Fragment
Mammuthus / Mammut molar fragment
fossil
Mammoth Tooth
Mammuthus tooth fossil
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicon Dioxide (SiO2) - Calcified / Silicified Wood
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
mineral
Granite Boulder (Glacial Erratic)
Granite
igneous
Chert (Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Siltstone with Sandstone Bands
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Sandstone (Arkose)
Arkose Sandstone (SiO2 with KAlSi3O8)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Gemstone bead necklace (likely citrine or yellow quartz)
Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them
gemstone
Fossiliferous Limestone (containing Brachiopods)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (often called Flint or Jasper)
Microcrystalline quartz (SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Polished Marble (likely Carrara-type with Iron oxides)
Metamorphosed Carbonate (CaCO3)
metamorphic
Granite Pebble (Salt and Pepper Granite)
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)
igneous
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Mosasaur Tooth
Mosasaurus sp.
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (mainly Quartz / SiO2)
fossil
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Sandstone
Sandstone (principally SiO2/Silicon Dioxide)
sedimentary
Vuggy Limestone
Calcium Carbonate (CaCO3) with Quartz/Calcite inclusions
sedimentary
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Coral Fossil (Scleractinia)
Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary