Diamond has a strong affinity with oil and attracts dust easily. The safest way to clean diamond is to use tepid water with a small amount of neutral soap or detergent. Use a soft-brush to brush it. Finally, rinse with water. When cleaning diamond jewellery, remember to block the sink or to wash it within a bowl in order to avoid slipping it down the drain. To clean pearls, one only needs to wipe them gently with a soft cloth. All jewelleries are luxury items. If there is any doubt in the care of jewellery, one should seek help from a reputable jewellery shop.