This is a slab of limestone with three detailed and brightly colored Ophiura brittlestar fossils
from the Kataoua Formation of Morocco. These Ophiura brittlestars are Ordovician in age, or approximately 450 million years. The dark orange coloration is due to the oxidization of iron pyrite. One of the brittlestars is till partially covered by the limestone. It's likely complete and could probably be further exposed
Comes with a display stand.