For Dry areas I have seen the suggestion of placing a small container with a sponge and a few drops of water in the same container that holds your mineral, thuspreventing white patches caused by dehydration. Some people suggest adding a dessicant to the container (not touching your mineral) for humid areas. The final recommendation I have come across is rubbing mineral oil or sealing the mineral in laquer. I live in North Texas (about 40 miles North of Dallas). North Texas kind of gets all kinds of weather, heat and humidity. My home stays at about 76-78F year round. Any suggestions from Texans or former Texans would be greatly appreciated. The specimens in question are "veiny" configuration and "cluster" form.