Here is a fabulous brutalist silvertone ring, featuring a rough amethyst set in a silvery mould and surrounded by a spiral of the same material.  It was made by Dansk Smykkekunst, a prolific maker of costume jewellery in the last quarter of the 20th century.

Condition: Excellent, no visible damage

Marks:  DS Handmade Denmark

Size:  the ring band is not sealed, so will adjust to any finger size.   The top of the ring is 3.5 cm (1.4") long. 

Year:  1970s