When we start looking for fossilized opals, it is essential to know how to distinguish between a dinosaur bone and a simple rock. Field scientists use practical methods to identify samples. One of the most surprising techniques is to lick the object in question. If the sample adheres to your tongue, it is very likely that it is ds, because they have a porous structure that makes them sticky, unlike the stones that remain dry in contact with the tongue. However, it is interesting to note that opalized dinosaur bones do not exhibit the same adhesion, although they are easily distinguished by their obvious glare and opalescent colours.