5,000 yo rock crystal dagger unearthed in Spain

A 5,000 year old rock crystal dagger has been found in Spain. The eight-and-a-half-inch dagger was found in a tomb at the Tholos de Montelirio site. Stone and flint typically comprise daggers, a rock crystal one is unusual. It's thought to have belonged to a high status individual due to the time and expertise required to make it.