As a rule, you should have your jewellery checked and cleaned every two years. The quality of the workmanship of the piece, the metal used, and the gem or gems used all play a part, however, the crucial factor is the amount of use by the wearer and the care taken when wearing the piece. These two factors significantly affect the longevity and condition of the piece. An example- do not wear rings when gardening or activities where the jewellery may be subject to heat, abrasives or strong chemicals i.e., acid or acid fumes.