Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia
View all →
Petrified Wood / Jasper Chert
Silicified Wood / Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified wood
Silicified wood, commonly quartz/chalcedony (SiO₂) replacing wood tissue
fossil
Shark Tooth Fossil
Carcharocles megalodon or similar fossilized shark tooth
fossil
Fossilized Shark Tooth
Chondrichthyes (class)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Black Jasper
Black Jasper (Silicate mineral - SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Polished brecciated jasper
Jasper, opaque microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide and dark silicate inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Bone
Petrified Bone (Fluorapatite / Calcium Phosphate replacement)
fossil
Petrified wood
Silicified wood, chiefly microcrystalline quartz (SiO₂)
fossil
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Chert (variously known as Flint)
Microcrystalline quartz (SiO2)
sedimentary
Epidosite with Quartz (Unakite-variant or Jasper)
Epidotized Metasomatite
metamorphic
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood (mainly Quartz/Chalcedony, SiO2)
fossil
Petrified Wood (Black / Carbonized)
Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Mammoth or Mastodon Tooth Fragment
Mammuthus / Mammut molar fragment
fossil
Mammoth Tooth
Mammuthus tooth fossil
fossil
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Snakeskin Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Mosasaur Tooth
Mosasaurus sp.
fossil
Coral Fossil (Scleractinia)
Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
sedimentary
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Chert Nodule in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Gastropod Fossil
Class Gastropoda (fossilized)
fossil
Petrified Wood / Fossilized Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil