This is a nice piece of Turquoise (looks like Number Eight type) - beautifully veined - and nicely set-off on a well crafted setting
Setting is a little over 1 inch long and a little over 3/4" wide - stone is a little over 3/4" long and 1/2" wide
Well Known "Platero" Artists although not sure which one
back is marked " PLATERO STERLING"
weighs approx 12g