They work perfectly independently of each other, are complementary and are going to reinforce each other’s effects very significantly (quadratically) . When worn together, the already powerful energetic fields of the Jewel Pendant and the Jewel Earrings merge into one field, combining both their workings. So both separately and together, they have an extraordinary impact on your personal energy.
Both together are going to bring heart and head (feeling and thinking) much more in balance and all the chakras are going to work together much more harmoniously.
