Designer Aleksander Gliwinski Amber Necklace. The Aleksandr Gliwinski butterscotch amber / gold-plated .925 sterling silver necklace is an exceptional jewelry item that has been crafted by the acclaimed Polish designer. Aleksander is a renowned jewelry artist from Poland, widely recognized for his exceptional work. The necklace is made of genuine butterscotch amber, gold-plated sterling silver, and leather. The necklace is 22'' long.