You already know that diamonds are foreveranda girl’s best friend, but we’re here to break the news that the world’s original online diamond jeweler Blue Nile is theultimatedestination for timeless, heirloom-quality accessories to show your love in sparkling form. And withMother’s Daycoming up this weekend (no, we’re not kidding), there’s never been a more perfect time to treat all the moms in your life — whether it be yourwife, a friend who just had a baby, or your actual mother — to a gleaming investment piece they’ll cherish forever.