Last summer we found few ghoststones with green speckles in them. It is called moss-agat, its a rare formation, where it looks like there is a moss inside the stone. This stone is so special that it deserves simple silver setting.
The reason for the name, Ghoststone comes from the fact that when you rub two of them together they glow in the dark. (Triboluminescence)
The stone is about 25mm (1 inch) and it comes with 45 cm long silverchain.