Four "Sand Gold Panning Experience 20th Anniversary Commemorative Pouch Cards" containing sand gold grains, presented to me in March 2017 at Toi Gold Mine in Shizuoka Prefecture, during a sand gold panning experience. Each card contains two grains of sand gold. Dimensions: 5.5cm x 8cm I have stored these in a drawer of my desk at home for many years, but there are no noticeable scratches or stains. They will be placed together in a plastic bag and shipped via Yu-Packet Post Mini.