Vintage Cactus Brooch w/Sparkling Diamond Cuts

Vintage silver-gray cactus brooch/pin with diamond cut divots which make it sparkle and looks like rhinestones. The diamond cut depressions are marquise shape. They sparkle as the brooch shifts in the light. The size is approx. 2.25" in length. The pin stem runs vertically down the center of the back and secures with a rollover catch. It is unsigned by it is stamped "Made in the USA" which can partially be seen under the pin stem. It is not a pewter pin.