Art Deco Style Sterling Silver Filigree Genuine Amethyst Gemstone Bar Pin / Brooch. Amethyst is a member of the quartz family and is the birthstone for the month of February. The amethyst has also been designated as a first wedding anniversary stonePlease see our complete selection of Sterling Silver pins / brooches. This filigree brooch is new and a quality sterling silver antique and collectible reproduction. All of my pieces are high quality sterling silver. You may see the word Sterling or a mark of .925 for 925/1000 pure silver. Thank you for shopping with us. Your satisfaction is always guaranteed.