Eight beautifully bezel set matched stones from the Cerillo Mine. Green-blue turquoise with caramel matrix. Hand made settings and chain. Acid tests as sterling. The largest stone is 1" by 7/8", the smallest is 7/8" by 5/8". Assume they are stabilized. Wearable length 25 1/2" with hook closure. The shorter you wear it, the less likely the stones are to turn over. Not signed. 1970s or earlier. when most items were unsigned. Excellent vintage condition.