- Brass gilded with 18 carat fine gold - Mother-of-pearl shell ✔ In order to keep the shine of Shyloh costume jewelry, you can clean them regularly with a small soft brush, water and a little soap, rinse then place them on a clean cloth and wipe them dry with a fine cloth. ✔ Avoid contact with water, chlorine, sea bathing, household products, perfume, or any cosmetics.