Beryllium is a chemical element that was discovered in 1798.  It's only found naturally when combined with other elements in approximately thirty different minerals the most important of which are bertrandite, chrysoberyl and beryl.

A steely grey coloured metal with many highly desirable properties, beryllium has one of the highest melting points and is one of the lightest of all metals.

Tiffany stone which is a popular lapidary material contains the mineral bertrandite hence the vast majority of this sought after stone is crushed up in order to extract its beryllium content.