No, that is not a natural color for that rock. The dying of rocks and minerals
In our shop we have many rocks and minerals for our customers to pick from. Agate slices, tumbled stones, many types of Jasper, and fossils. Some of these rocks and minerals are naturallycolorful, some of them have been, well, enhanced a bit. It usually not hard to tell which one have been dyed.
Of course, some customers ask us if that is the natural color and we do inform them that it is not.