Through 5/11, BlueNile.com is offering free overnight delivery on all orders in honor of Mother's Day, plus get free Saturday delivery on all orders over $500 and pay $15 for Saturday delivery on orders under $500. Plus, add the code MOMSDAY and save up to 25% on select gifts. Check out this Leaf Bib Necklace which drops from $55 to $41.25. Or take a look at these 1 carat Diamond Stud Earrings which drop from $2,200 to $1,980. There is no sales tax (except WA and NY).