Fossil bone fragments?

[Gust]

Hi,
I found two small shiny fossils (bone fragments?) on the beach near Domburg (The Netherlands).
Fossil 2 seems a bit toothlike in shape.
Does anyone know what this might be?


Size:
Fossil 1: 1.2 x 1.6 cm

Fossil 2: 1.0 x 2.4 cm