Vintage Peridot Green Flower Brooch

Beautiful, sparkling gold metal flower. This appears to be costume jewelry and I'm unable to identify any markings stamped on the back side. The center is a faceted Peridot green rhinestone inside of a flower, with six smaller flowers surrounding, as petals. Goldtone metal stem & leaves. I believe I measured this close to 4" Long, (and I probably accidentally deleted the photo of this laying against the measuring tape) I'll return to edit this with exact dimensions.