Thurso Sgian Dubh with Polished Pewter Mount and Coloured Stone Top. Choose a stone to match a kilt outfit or just pick your favourite colour from these stones – Amethyst, Blue, Cairngorm, Emerald, Jet Black or Red. Supplied in a presentation box. Designed and created in Scotland. all sgian dubhs are supplied with a dulled safety blade to meet with UK and EU legislation.