Adjustable U.S Sized 5-7.5. When life throws you shade, throw it right back with the Smoky Quartz crystal. Smoky Quartz crystal meaning links us to the highest realms of being and amplifies the truth of everything around it. If Smoky Quartz has found its way into your life, it could be a sign that it's time to open the windows of your heart and let in the light and positivity. The truth can set you free and the Smoky Quartz crystal provides the roadmap to get there.