Beautiful Sterling Silver Art Deco Style Filigree Blue Topaz Bar Pin / Brooch. There are many colors of Topaz, Blue Topaz is sometimes used as the birth stone for the month of December along with Blue Zircon. The Blue Topaz is also the suggested anniversary gemstone for the 4th, 19th or 23rd year of marriage. Please 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.