The energy of a SN explosion is so huge that elements heavier than iron are made in the debris. For the tall tower of building blocks, the supernova explosion itself provides the glue to make these large, heavy elements stable. This is how gold, silver, calcium, tin and other heavy elements are made. A supernova explosion is the only process that has enough energy to make these elements. So, any gold or silver you are wearing tonight, and even the calcium in your bones, were made in a supernova explosion eons before our sun and planets formed.