The products are original rhodium plated xuping - also called medical gold. The stones are zircon. It is offered for sale as a single piece. The product can be used on different parts of the ear as seen in the photos and video. Color change is minimized - durability is at a high level. It is a compression earring. You don't have to have a pierced ear to use it. It can be used by passing it through the thinnest part of the ear cartilage and placing it downwards or upwards. It does not affect pool and sea water. It should be protected from chemicals. Since it is in the hygienic product group, it is not suitable for exchange or return.