Carnelian Natural Stone Bead Pendant Necklace

This came from a woman who traveled all over the world, including Africa, Mexico and China so I'm not sure where this came though I'm certain it's not 'local'. The beads on this are gorgeous...I believe many (or all) are carnelian. The centerpiece pendant is a rich rust color and the beads up the strand vary in shape and coloring. Some look like marble. All are highly polished, smooth as silk. Necklace measures 24 inches around and pendant piece is 1 1/2 inches high. Necklace has a nice silvertone toggle clasp...it's all in excellent condition.