Jewelry designer Stephen Dweck is celebrating his 25th anniversary this year and, in honor of the occasion, he has released a new collection of one-of-a-kind pieces at Bergdorf Goodman. The pieces include necklaces, rings, earrings and bracelets, all with semi-precious stones, as well as a variety of pearls and diamonds. The settings are primarily done in silver and yellow gold. Almost every piece, including the bronze-set blue Topaz Ring ($3,375) pictured here, has Dweck's signature 18-karat yellow gold beetle with pavé diamonds affixed to it.