HJT HongJinTian Crystal Natural Light Smokey Quartz Pyramid 2.36&ldquo;w Made of natural smokey quartz crystal stone measuring 2.36 inch at the base Smokey Quartz has been used in the past to treat radiation sickness by absorbing some of the radiation from the victim. promotes positive, pragmatic thought" Smoky Quartz helps to clear the mind in preparation for meditating. plays a good decor for home or office