Antique Art Nouveau Lion Old Mine Cut Diamond 18K Yellow Gold Stick Pin c.1910. The stick pin is a has a detailed sculptured lion with a diamond in his mouth and wood like frame. The pin is marked 18K with a makers mark. The old mine cut diamond is .10 carats I SI-2 clarity. The pin measures 67mm high by 15mm wide. Excellent Condition, Weight 4.8 grams,