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When it comes to buying jewelry for celebrities like Mariah Carey and Kourtney Kardashian, money is no object!

For Mother's Day, Scott Disick gifted his ladylove Kourtney Kardashian with a custom locket made up of 14 carat gold with more than two carats of pave diamonds. The stunning $9,000 piece of jewelry, created by jeweler Jason Arasheban of Jason of Beverly Hills, featured a photo of son Mason inside with the inscription "Happy Mother's Day, Love, Scott." Awww ... we're melting!

Mariah Carey also had a bling-filled Mother's Day. Hubby Nick Cannon gave the new mommy of twins a $12,000, 14 carat, white and rose gold necklace with the twins' names, Moroccan and Monroe, written in more than four carats of white diamonds and pink sapphires.

Now THOSE are gifts! See the photo of lil' Mason on the back of Kourtney's locket ... after the jump.