Sapphire Cobblestone Necklace of NantucketSapphire Cobblestone Necklace Of Nantucket On our first trip to Nantucket there was a lot to impress, the white convertible we rented to tour the island, houses with gray weathered shingles, red roses vining on trellises, streets lined with stately elms and the cobblestone streets in downtown Nantucket. Ill never forget waking the first morning after heavy thunder and lightning showers the night before and stepping out on to the cobblestone street in