Bibi Van Der Velden sapphire egg mammoth earring in yellow gold. Bold and sculptural, the Mammoth Egg Earrings Blue make a striking statement. Designed as three graduated eggs set on a drop earring, their smooth form is crafted from mammoth tusk. In 18k yellow gold settings, each of the eggs is set with multi-colored sapphires. These captivating earrings are part of Bibi van der Velden’s Mammoth collection, fashioned from 40,000-year-old mammoth tusk that has been unearthed from the Siberian permafrost. 18K Yellow Gold