Vintage Sterling Brutalist Iriniri Amethyst Ruby Zoisite Brooch

This fabulous vintage sterling brutalist brooch from Iriniri features a large freeform design set with a 14mm high done amethyst cabochon and a 29 by 19.5mm ruby zoisite. The angled center is filled with freeform balls of silver. The silver background has a fine texture with scattered silver balls. The brooch is quite large, measuring 2 7/8 across the center and 3" from gemstone corner to corner. Signed Iriniri with the date 1991 and a partial "sterling"strike.