It’s marble! Fucking marble! The talent of the artists during the Renaissance era is overwhelmingly breathtaking sometimes. And other times it creeps the fuck out of me with all the angry Jesuses and plumply little cupids.
Opalized wood. Petrified wood is basically fossilized wood that has had it’s organic matter replaced by a mineral such as agate, bit by bit, as it decomposes. The wood structure is maintained, but the wood fibers are slowly changed into stone. Sometimes a jasper, quartz, pyrite or even opal(shown above) can be found fossilized in wood.