That is what Caroline Scheufele, creative mastermind of Chopard, learned when she took on the task of transforming a hulking raw rock into high jewelry-worthy gemstones. “Unlike diamonds ... The 6,225 ...

Jewelry designer Nina Runsdorf was at a trade show in the early 2000s when a “large brown rock” the size of a pebble caught her eye. The seller told her it was a rough brown diamond.