Geometric Brooch by Andrew Grima. The 18k yellow gold brooch with multiple gold rods, rectangular-cut green and & watermelon tourmaline, accented with round white diamonds. A chic and stylish brooch by master artist jeweler Andrew Grima, known for his cutting edge design, he is considered one of the most important artist-jewelers working in the last half of the 20th century. Interesting and unusual , his jewelry is found in some of the most discerning collections in the world.. just ask the Royal family . This sculptural piece is suits any suit. Modern Elegance.