Opalite Merkaba pendant necklace. Measures just 1 inch across and comes with a 24 inch white gold plated chain. Merkaba is a combination of three different words. Mer is a light that rotates within itself; Ka refers to the human spirit and Ba alludes to the physical human form. Egyptians believed that Merkaba is a rotating light that carries the human body and spirit from one plane to another. Opalite is a wonderfully serene crystal. It is said to bring inner peace and a sense of calm.