Yooperlite is a stone of truth that represents confidence, self expression and authenticity.  A great stone to use in meditation due to its calming energies.  It enables you to focus your mind while it also gives you increased energy and provides stress relief.  The beauty of Yooperlite is that its also reactive under a UV light with vibrant flashes of orange and/or yellow showing up under the light
 
Chakra: Throat