Work by Grima and his contemporaries features strongly in Bonhams’ sale on March 6. An imaginative owl brooch by Grima (1975), left, formed with gold and turquoise accents to a crystallised agate geode, is estimated at £3000-4000, while a typical diamond brooch-pendant with gold cagework by Alan Martin Gard (also 1975) is pitched at £1000-1500. Also pictured above right is a relatively late work by John Donald, a frosted blue glass and gold flower brooch estimated at £800-1200.