Not to mention how Baren gets the Silmaril. He and sneak into Morgoth’s fortress, and Lúthien puts at sleeping spell on Morgoth. Beren prys the jewel from Morgoth’s crown and they flee. A giant wolf, Carcharoth, was guarding the gate. He attacked and bit the off Beren’s hand, with the silmaril inside. The wolf went crazy and ran off. Beren went back to Doriath and reported that the silmaril was in his hand inside the wolf. It was tracked down and killed by an Elven warrior, who gave Beren the honor of cutting it out.
Just finished (re)-reading The Silmarillion. Carcharoth was killed by Huan, the great wolf-hound of Valinor, but not before he mortally wounded Beren. Mablung the elf-warrior was the one who cut the silmaril out.