Blue Onyx Gemstone - To Manifest Desires and Calm MindWhen Chalcedony crystallizes in the blue, white & brown masses, the blue onyx is formed. Its colour is caused by the Tyndall Effect ensues when light strews from colloid sized atoms. This is a rare and quickly sold stone; hence, its shortage is experienced more. Experts call Blue Onyx a stone filled with purity, divinity, and mystical powers. Blue Onyx @pandit. com is for those who want to encounter higher self, a higher realm, and universal powers.