Not every attempt to turn an old coin into a wearable ring is successful. Sometimes, the coin just cannot take the strain and it will bust, tear or shatter. This South African coin tore when I was coning it on the jeweler's mandrel.
Too bad too, as this was looking to be a very detailed and ornate presentation on both the outside edge and inside...
Ever wondered what the rarest gemstones on Earth look like? Take a look at the top 10 rarest and most beautiful gemstones on Earth. +These precious stones are so rare, you may never have even heard of them!