Shay Fine Jewelry SHAY jewelry is handmade using natural, untreated diamonds and precious gemstones set in 18-karat gold. Created by Ladan and Tania Shayan, Los Angeles natives and mother/daughter duo, the collection i SHAY fine jewelry is handmade in Los Angeles using diamonds and precious gemstones set in 18-karat gold and platinum. The collection – including rings, necklaces, chokers, earrings, bangles and cuff bracelets - contains contemporary and estate/vintage pieces.