This is a beautiful and rare geometric harstone brooch by famous intarsia designer Nicolai Medvedev. The hardstone consist of opal, malachite and sugilite. The brooch is signed on the back N. Medvedev dated 1988. The 18k gold work is signed and designed by J Eriksson. Medvedev is one of the most important current intarsia stone workers. The brooch and hardstone is in excellent condition, Weight 17.0 grams, Measures 42mm high by 33mm wide.