If looked after well and polished only with a soft cloth, sterling silver, gold and platinum will last indefinitely. However, please avoid contact with hair spray and perfume.
Silver plated items should be wiped down with a soft cloth after use. Do not wear in the shower if at all possible, in order to keep the original shine.
Porcelain will last forever. However, please be careful not to drop your piece, as if it falls onto a hard surface it might break.
It takes a long time to achieve such beautiful work, each piece is finished with gloss glaze and handpainted with 24k gold lustre or platinum, then fired 3 times in total to 1200 degrees celcius. Care for these by wiping with a soft cloth only.