Seraphinite is a material famed for its chatoyant, feathery forms. It's a formation pattern of clinochlore, which is itself a kind of serpentine - but it can and frequently does occur as seams in deposits of other types of serpentine. This piece from the Hokitika River is an example of that phenomenon, in which the dark green seams of seraphinite are flowing through a mostly yellow serpentine matrix. And while these seams have photographed dark, they're actually fully chatoyant, showing feathery silver light patterns througout themselves as the pendant is moved back and forth in the light.
 
Measuring in at 83mm long and 48mm wide at its widest point, this pendant has been reduced to a thin slice of stone, making it extremely lightweight and thus suitable for everyday wear. It's a budget piece for the person who appreciates the visual qualities of seraphinite, but can't afford the cost of a more spectacular specimen of it.