Brian-
According to their website:
Meteorite Ring Care
Our custom rings are quite durable. That being said, if you want your ring to stay looking nice you should care for your ring as you would any fine jewelry. Some common sense will go a long way in this regard. Don't wear your jewelry while doing yard work, construction work, automotive work, or similar activities or while handling abrasive or corrosive materials. Don't abuse your jewelry, or hit it against hard objects that could dent or scratch it. The Gibeon and Seymchan meteorites tend to be naturally rust-resistant, so while hand washing and showering is, in our experience, not a problem, we do not recommend exposing your meteorite jewelry to excessive moisture. As with any fine jewelry, our rings should not be exposed to chlorine, bleach, chlorides, house hold cleansers or acids (you hands probably shouldn't either). Don't wear your jewelry in salt water, the hot tub or swimming pool. We have noticed that some hand lotions can cause staining of our finger so we avoid wearing hand lotions with meteorite rings. In cold weather or if you go swimming, your finger can shrink quite a bit causing your ring to fall off, so don't go swimming with your jewelry. After a number of years, the etched pattern of your meteorite ring may be less sharp. If this occurs, the ring can be re-etched.
http://www.arizonaskiesmeteorites.com/Damascus_Rings_Meteorite_Rings/About_The_Meteorite/