This antique button is a one-of-a-kind piece that any collector would be fortunate to have. The button features a round shape with blue, silver, and mushroom colored rhinestones. It was manufactured before 1930 and is a beautiful example of Gay '90's style. This shank button is perfect for any sewing project and is sure to add a touch of elegance to any garment. With only one available, don't miss out on the opportunity to add this stunning antique button to your collection. If it were me, I’d make a beautiful brooch out of it!! I do t know what the material is of the base of the button; all I know is that it is BEAUTIFUL!!!! It has some imperfections on the back of the button, so please see the photos. It is vintage, around 100 years old, so please don’t expect brand new. It measures approximately 1 & 5/8” across and has an etched leaf (?) design on both of its sides. It is so cool.