18 pieces Fulgurite lightning fused sand Sahara desert in 6 display boxes For Sale

6 display boxes containing 3 pieces each of fulgurite,sized approximately 1/2 to 1 1/2 inch long by 1/4 to 3/4 inch wide,scooped from fulgurite display boxes as pictured.18Rare specimens of the mineralfulgurite.These are the lighter singing type that have a distinctive ring to them when hung up and struck createdwhen lightning hits dry sand fusing it into these specimens.Great educational and hands on learning specimens of all naturallightning fused sand,known as fulgurite,from the Sahara desert in northern Africa.