This pendant uses 3 interlocking rectangles to form a vertical chain. Each link moves easily, letting the pendant conform to the wearer and giving the necklace some movement as well. Another version, somewhat larger, is available here
And if you would matching earrings, you can get them here:
Rectangular Post Earrings
This picture is of the pendant in polished silver.
geometric pendant - interlocking metals - silver necklace - silver pendant - jewelry set