Blue Chalcedony "Good Will Stone" is a sacred stone by the Native American Indians, chalcedony nurtures and promotes brotherhood and good will. Sometimes called "Mohave" and "Mt. Airy Blues", originating in California and Nevada, these are a slight to moderate grayish blue color, ranging from a light to medium blue color intensity. Blue chalcedony from Nambia, often called "African Blue", ranges from grayish to nearly pure blue and from light to medium dark. The most valuable blue chalcedony is sourced from Oregon, USA. Its blue color is slightly modified by traces of pink, resulting in a noticeably lavender gemstone, which is nonetheless referred to as "holly blue". Chalcedony is a common quartz found in the United States, Austria, Czech Republic, New Zealand, Turkey, Russia and Brazil.