JewelMint's Atlanis Pendant was a quick March Collection sell-out. Like most pieces that sell out super fast at the beginning of each month and eventually restock, there's still some hope this piece may come back...someday anyway!
In the meantime, I've set out to find a few pieces that look similar! I'm loving the Shell Charm Necklace from Max&Cleo, but the price is a little steep at $178. The Shell Horn Charm Necklace over at AE is an awesome deal for only $10 (on sale). Except I would probably remove all the charms and reattach them closer together as a cluster.
Check 'em out!