Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron and manganese inclusions
sedimentary
Category
Sedimentary (Silicified Fossiliferous Chalcedony)
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
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Flint (chert), possibly fossil-bearing
Microcrystalline quartz (SiO₂), chalcedony/flint variety
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz, Chalcedony, or Opal)
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
metamorphic
Crinoid Stem Fossil (in matrix)
Crinoid (Class Crinoidea)
fossil
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Tumbled orange chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
Petrified Wood
Fossilized Wood (silicified wood)
fossil
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
mineral
Flint / Chert (or fossiliferous nodule)
Microcrystalline quartz (SiO2)
sedimentary
Petrified Wood / Red Jasper
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Fossilized Wood (SiO2 replacing organic matter)
fossil
Rounded chert or chalcedony pebble
Microcrystalline quartz (SiO₂), possibly silicified limestone or agate-like chalcedony
sedimentary
Petrified Wood
Silicified Wood / Xylopal (SiO2)
fossil
Petrified Wood
Silicified Wood / Xylopal
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement)
fossil
Petrified Wood
Fossilized wood / Silicified wood
Sedimentary / Fossil
Red Jasper (with Quartz inclusion)
Silicon Dioxide (SiO2) with Iron Oxide impurities
sedimentary
Turritella Gastropod Fossil
Turritella (mollusk fossil in sedimentary matrix)
fossil
Petrified Wood
Silicified Wood (mainly Quartz / SiO2)
fossil
Jasper (Red/Yellow)
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Aquamarine (Pendant) and Jasper (Beads)
Beryllium aluminum silicate (Be3Al2Si6O18) with Chalcedony (SiO2)
mineral
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Quartz-rich pebble, possibly chert or silicified limestone
Microcrystalline quartz (SiO₂), possibly chalcedony; exact identification is uncertain from the photograph
sedimentary
Ocean Jasper
SiO2 (Silicon Dioxide with impurities)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood (Black / Carbonized)
Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Banded chert or siliceous mudstone
Microcrystalline quartz (chalcedony), SiO₂; possibly ferruginous shale
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Chert or flint fragment
Microcrystalline quartz (SiO₂), often with chalcedony
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
sedimentary