Rare piece from the Fenton glass company.. these are the last pieces from Fenton, I acquired them directly from the plant when they closed, so there are no more to be found. Very Rare for collectors to sell from their collections. I have many more pieces I will be selling from my personal collection. Good Size Specimen. 4 pounds 7.16 oz This Slag Rock is Beautiful!! Throughout it has very unique formations with swirling colors of ruby red, light red and neon yellow green.. This piece is absolutely beautiful in daylight, when the lights go out and it’s exposed to UV/black light it’s absolutely stunning!!! The neon yellow green reacts to the UV light. It catches light beautifully. Can be used in aquarium’s, terrariums, home decor, outside gardens or any thing you can think of. I use them near windows as sun catchers. The piece you see in the picture is the exact piece you will receive. There are some sharp edges, so gloves are recommended, just to be on the safe side. Uranium slag rock. Open to offers