A good friend and mining partner of Robert’s, Keith Sheel, rockhounded in Utah decades ago in search of Fossilized Dinosaur Bone. Luck was often with him as he found a large quantity. 
He cut one piece into this 40x30mm oval Cabochon and we set it in a Sterling Silver Pendant. The pendant weighs ½ Ounce.
 
For this Pendant, we recommend a 20” or 24” Medium Reverse Rope Sterling Silver Chain, #1116.