Blue Chalcedony is a nurturing stone, and it absorbs negative energy. Blue Chalcedony brings the mind, body, emotions and spirit into harmony. It helps promote peaceful assertiveness. This can bring peaceful resolution to conflicts. The inspiration behind this precious Blue Chalcedony gemstone is the most distant and planet in our galaxy, Neptune, because of their physical likeness. Neptune is also the coldest planet in our galaxy; at the top of its cloud, temperatures on Neptune can dip down to -221 degrees Celsius.