The product is original rhodium plated xuping - also called medical gold. Color change is minimized - durability is at the highest level. The stones are pearl and zircon. It is a compression earring. You do not need to have a pierced ear to use it. In the photographs, the position of the cartilage in the upper and lower parts of the right and left ears is shown separately. It is sold individually. It does not affect pool and sea water. It should be protected from chemicals. Since it is a hygiene group product, it is not suitable for exchange or return.