Bulgari has dedicated its 125th Anniversary to a worthy cause. The luxury jeweler announced on November 18 its plans to auction off a collection of 11 one-of-a-kind jewels and 7 limited edition timepieces at Christie’s in New York on December 8. The collection’s proceeds, valued at approximately $4 million, will go to the Save the Children charity.

The offered jewels include a multi-colored sapphire and diamond necklace, consisting of 396.29 carats fancy colored sapphires and 66.45 carats of round cut diamonds, as well as a diamond “Lucea” choker necklace, a white gold necklace set with 33.82 carats of marquise cut diamonds, 7.16 carats of round cut diamonds and 38.67 carats pave set diamonds.

The proceeds of this auction will be in addition to a $14.85 million pledge that Bulgari made to the charity earlier this year, generated partially by the sales of a limited edition silver ring.