Yes!
All SoaC jewellery is solid metal only. It can be worn in water without your skin turning green. The nasty green skin is from cheap, factory-produced jewellery that is brass, copper, or nickel plated with a microscopically thin layer of silver or gold so it looks nice when you first buy it (but only lasts a week)
This is why I only create pieces using heavy, high quality solid metal, rather than plating cheaper base metals.
Some gemstones CANNOT be worn in water: please avoid water with opal and pearl pieces. Water can cause pearls to swell and opals to cloud over.