1) Always remove your emerald ring before heavy activities, washing dishes by hand, or working with tools. A hard knock against a stainless steel sink can break an emerald.
2) Clean your emerald periodically (when it is clearly dirty!) with warm water.
Clean your emerald jewelry by using room temperature running water and a soft toothbrush: brush repeatedly on the underside of the emerald (and diamonds) to remove accumulations of dirt and grease. Use a mild soap like hand soap or Woolite. You will see that the diamonds begin to sparkle like new and the emerald will brighten. After drying the gold can be rubbed with a polishing clothFor a professional cleaning, go to a laboratory, where certain professional acids will be used as well a cedar wood oil enhancement.
3) DO NOT USE ANY ULTRASONIC CLEANERS OR STEAMERS. Avoid extreme temperature changes and high heat.
4) Avoid exposing fine emeralds to intense heat, for example, while cooking, it can make liquid inclusions expand, causing fracturing; it can dry out oil in emeralds; and can cause permanent damage to your gems.
Every 12 to 18 months have your jeweler check each piece to make sure the setting is secure, and have prongs or shanks reinforced as necessary. Failure to take care of this may result in loss or damage.