Pearls are classic, but there are times when one craves a good mix of classic and funky. This Marciano Kendra Knotted Pearl Necklace ($20, originally $58) is it. The hematite-colored beads lend ruggedness, while the twisting and knotting effect make it trendy. It's like pirate's booty, only more refined. Throw it on over a casual tee, boyfriend blazer, and dark denim jeans — basic to bam in a sec.