Blue Agave is a large oval shaped concho button, 1.25" across and 1.5" tall, or slightly less. Nickel silver with a satin finish and a bit of shine, with a faux turquoise center and scallops and diamonds around the edges. Shank loop opening is around 2.5mm.  Made by hand, one at a time, in the Four Corners Area, U.S.   Charming variance in the shape of the metal 'frame' that holds the turquoise, as you can see.