Set up by Leslie Illsley, Benny Sirota, and Jan Thompson, Troika was made between 1963 and 1983 at the Wheal Dream site in St Ives.
The eight-lot group at Lawrences includes coffin and disc-shaped vases and this 6in (16cm) circular piece with stylised symbols estimated at £80-120.
Contact 01460 73041.
