A fossil.
An organism whose tissues are completely replaced by minerals is a fossil.
During fossilisation, living cells are replaced by minerals. This preserves the physical appearance (but not the original organism)
In geology, petrification or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals. So yeah the answer is petrification
When an organism is petrified its organic tissue is most likely replaced with minerals.
Permineralization is the process of fossilization where mainly water mineral deposits take the form of the organism. The minerals harden with time and pressure from over laying deposits turning into rock. Petrification happens when silica binds with celulose of a plant and turns into stone often retaining the microstructure of the plant.
The cell contents are replaced over a long period of time by minerals.
Petritrified Fossil- a fossil formed when minerals replaced all or part of an organism.
The resultant fossil would either be referred to as permineralized, where the original pores spaces were infilled with minerals, or petrified, where the original organic matter was replaced with minerals.
Minerals such as silca, iron, and pyrite are critical for fossilization in both processes. However, in replacement, the hard structures of the organism dissolve and are replaced with minerals. During replacement, the original microscopic details, such as the inside of a bone, are partially or totally destroyed. ~Follow me on Twitter: @jennholguinxo I follow back!
All are indicative of the size and shape and possible habitat of the original organism.
organization
Like most fossils, dinosaur fossils have been mostly replaced with minerals and are not made of the original material. However, many contain trace amounts of original material. Some even contain proteins from the dinosaur.