fossil

Petrified Wood

Silicified wood (SiO2)

Hardness of 7 on the Mohs scale, varied earthy or vibrant colors, vitreous to dull luster, cryptocrystalline quartz structure.

Identified October 22, 2026More fossil →

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Physical properties

Hardness of 7 on the Mohs scale, varied earthy or vibrant colors, vitreous to dull luster, cryptocrystalline quartz structure.

Formed when buried vegetation is slowly replaced by minerals like silica under anoxic conditions, often millions of years old.

Used for ornamental carving, luxury furniture, decorative display, and lapidary collections.

The organic material is entirely replaced by stone while preserving the original cellular structure of the tree.

Identify by visible wood grain combined with conchoidal fracture and high hardness; found worldwide in sedimentary strata.

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

Likely fossil oyster shell

Fossilized bivalve shell; exact species cannot be identified from the image

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

Fossiliferous limestone (likely a crinoidal or shell-fragment limestone)

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

Porous limestone pebble

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image