What is a druzy? A druzy is sets of tiny crystals of minerals that form on the surface of another stone. Chalcedony is a nurturing crystal that promotes positive relationships and good will. It absorbs negative energy and brings the mind, body, emotions and spirit into harmony. Blue Chalcedony is a calming stone that allows the holder to relax and find balance in life. It is a nurturing stone that helps bring optimism when faced with negative situations.