Peruvian Chrysocolla  necklace made with one 30mm round cabochon and one 40 x 25mm teardrop cabochon, surrounded by 3mm sterling silver beads. Black fiber. Has an extender chain that allows you to wear longer (white shirt) or shorter (black bust).
 
Please note: Over time the black cord beneath the green cord on the necklace has darkened the green cord. The most accurate depiction of the colors are in the video rather than the still photo.