Designer Aleksander Gliwinski Amber Necklace. The Aleksandr Gliwinski butterscotch amber and .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 designs. The necklace is made of genuine butterscotch amber, sterling silver, and leather. The necklace is 20″ long.