3.1" Fulgurite Petrified Lightning Strike Glass Sahara Desert Algeria Knightia They possess two valves (shells)

They possess two valves (shells) that are generally symmetrical and can vary in shape from rounded to oval

a brittle tenacity

and duck-billed snout

making them a prized addition to any collection

3.1" Fulgurite Petrified Lightning Strike Glass Sahara Desert Algeria Knightia They possess two valves (shells)Location: Sahara Desert, Algeria Weight: 0. 5 Ounces Dimensions: 3. 1 Inches Long, 1. 2 Inches Wide, 0. 7 Inches Thick The Item pictured is the one you will receive. Fulgurite is a type of natural glass formed when lightning strikes sandy soil or sand dunes, creating a fascinating geological phenomenon. The extreme heat produced by the lightning bolt fuses sand grains, forming hollow tubes or branching structures known as fulgurites. Also referred to