The Set & Stones Nathalie Necklace, adorned with a freshwater keshi pearl, epitomizes elegance with its timeless design. The Set & Stones Nathalie Necklace, adorned with a freshwater keshi pearl, epitomizes elegance with its timeless design. Sarah Tullgren founded Set & Stones in 2016 when her love of jewelry was reignited by her grandmother's heirloom collection. From dainty designs to conversation-starters, Set & Stones uses high quality materials to create thoughtfully designed pieces that are meant to be worn and loved all day, every day.