gold and tourmaline brooch

A 14 carat gold brooch set with a cabochon cut green/bluish tourmaline (app. 3 carats), by Archibald Dumbar (1916-1988), with its original case, circa 1955.

weight: 12 grams
dimensions: 5.2 x 3.2 grams
dimensions tourmaline: 9.2 x 6.7 mm