Porcelain is a very hard but very fragile material. because it is fires at a very high temperature has no problem with heat but it will brake if it falls on the floor. After wearing it put it away safely.
To clean in you can wash it with soap and warm water
Brass, Bronze and Silver are "living metals" and tend to oxidize depending on the skin PH.
Clean regularly with anti-tarnish cream ( Argentil ect..) water soap and polish with a soft cloth
Gold Plated Metal
The gold layer is delicate and tends to disappear over time. The speed at which this disappears depends on the way in which the jewelry is cared for. Loss of patina is a normal phenomenon
Store it separately, beware of scratch and tear. Wash with soap, warm water and polish with soft cloth
Enamels are delicate and can be scratch easily, store separately. Keep them away from heat sources like hairdryer and heating appliances.
ABS 3D printed
ABS is a strong and flexible material, but fears heat and chemical solvent (like nail varnish remover etc..)
Keep it away from heat sources like hairdryer and heating appliances.