Question

1. how did the discovery of marine fossils in the patina finally prove that the stone and the ossuary were fakes? 17. why did investigators conclude that the stone probably came from a crusader castle?

Explanation:

1. Marine fossils in the patina suggest an artificial or non - authentic formation process. Patina on genuine ancient artifacts forms through natural, long - term environmental processes. The presence of marine fossils out of their expected geological context indicates that the patina was likely fabricated, thus proving the stone and ossuary were fakes.
2. Investigators might have found characteristics of the stone such as its composition, texture, or markings that are similar to those of stones used in crusader castles. Also, historical and archaeological context in the area where the stone was found could have pointed to a crusader - era origin.

Answer:

1. The presence of marine fossils in the patina out of proper geological context indicated fabricated patina, proving fakes.
2. Stone characteristics and historical/archaeological context suggested a crusader - castle origin.