Buy Jewelry Online at http://www.lifestylemegamart.com/fashion-accessories/jewellery. Just bought some jewelry and want to ensure that it is kept clean. To clean your Gold jewelry, you can make use of a Soft Wet Cloth and a Gentle Detergent. Precious Gemstones such as Tanzanites and Emeralds and Semi-Precious. Gemstones are trend to absorb liquids, if soaked. Diamonds can be cleaned using an Ammonia-Based cleaner. Store opal in the most exposed area for soaking moisture from the air.