You can rely on household cleaning ingredients such as a mild detergent to keep your ring clean. For this, mix a detergent or dish soap in a bowl with warm water. Fully immerse the aquamarine diamonds ring in the solution, and allow it to remain undisturbed for about 15 minutes. Use a prong to hold the ring, and then with a toothbrush, gently scrub the ring thoroughly, especially in its hard to reach areas.
Then, rinse the ring in water so that any remaining soap or dirt are removed. You need to keep the stone in a humid free region to fully dry the ring. This is important, as allowing water to stay in the mountings or other difficult portions of the ring can result in mold growth. You also need to keep a special box stuffed with velvet or a soft cloth for keeping your aquamarine diamonds ring in when not wearing them.