Olivia Button Rivière - MintLarkspur & Hawk mint Olivia Button Rivire. The rivire, a continuous river of stones that flows around ones neck, and a staple of Georgian jewelry, has become one of Larkspur & Hawks signatures, which all began with the Olivia Button Rivire. A silhouette that continues to be one of our most popular styles, it can be worn layered, alone, back to front or as a choker by hooking the clasp between any of the stones, proving to be the most versatile option