Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Category
Mineraloid Like Synthetic Material
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
Learn about Mineraloid Like Synthetic Material in the encyclopedia
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Asphalt (Bituminous Rock)
Natural bitumen or Bituminous limestone/sandstone
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Tumbled amethyst
Quartz, SiO₂; purple variety colored mainly by trace iron and irradiation
mineral
Amethyst quartz cluster
Quartz, SiO₂; purple color caused mainly by iron-related defects and irradiation
mineral
Sandstone
Arenite (SiO2 based typically)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Flint)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Siltstone
Siltstone (composed of clastic quartz and feldspar grains)
sedimentary
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Mineraloid / Industrial Waste
Chert (variations include Flint/Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz replacement, SiO2)
fossil
Chalcedony (Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone with Fossil Leaf Impression
Sedimentary rock (Sandstone/Siltstone matrix) with Carbonaceous film fossil
fossil
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Tree Agate
Chalcedony (SiO2)
gemstone
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
sedimentary
Chert (Quartz var.)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
sedimentary
Sandstone (Banded)
Arenite (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Petrified Wood
Silicified wood (principally SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Diorite (Polished Tumble)
Diorite (Intermediate intrusive igneous rock)
Igneous
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
sedimentary
Pumice
Pumice (Vesicular volcanic glass / Rhyolite or Trachyte)
igneous
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary