Zales cuts up to 30% off a selection of Mother's Day jewelry, including rings, and earrings, and bracelets. (Click the "Shop In-Stock Gifts" link on the pink "mom" image.) Even, better, get up to an extra 15% off in-cart, dropping prices to as low as $11.39. Shipping via UPS 2nd Day Air starts at $6.95.
Order by May 8 at 1 pm ET via UPS 2nd Day Air (which will be upgraded for free if needed) for arrival by Mother's Day; ship-to-store options aren't guaranteed.