Porcelain jewelry is fragile, but if cared for, can have a nice long life. Store them separately from other jewelry that may scratch or mark the surface. Be careful when taking them on and off, especially over hard floors like concrete and tile.
Most of the pieces are unglazed porcelain so they have that nice matte finish and texture. If your jewelry becomes slightly dirty (from handling or makeup), it's easy to clean. Use some mild dish soap and water and gently scrub with a toothbrush.