This amazing rainbow fluorite slab has layers of purple fluorite, yellow flourite and clear fluorite which have formed through each other in beautiful layers. This slab has been cut from a giant formation of fluorite in the Hunan Province of China, where fluorite is found in abundance, but a clear slice like this is very rare. fluorite can absorb and shield us from electromagnetic radiation given out from electronics and wifi. Fluorite also absorbs negative energy of the spirital kind. This size of this slab makes it the perfect shield, and so it is great to have around you when working on a computer or using a phone to shield from the harmful radiation from devices. This crystal is 11cm tall and 12.7cm wide and 1.6cm thick. It weighs 660grams.