4th chakra. This Dioptase comes from Tsumeb Namibia, the matrix is Calcite. Some feel that Dioptase is an important healing stone for it can clear and stimulate all chakras to a higher level of awareness and action. It is also invigorating and refreshing on all levels. This beautiful green crystal enriches ones life, environment and planet. Dioptase can promote inner cellular awareness, allowing for knowledge of any health problems that maybe lurking. On a physical level Dioptase has been used in the treatment of Meniere's disease. Vibrates to the number 8.