Signed Bob Mackie Mosaic Guardian Angel Goldtone Enamel Brooch Pin Excellent condition! See photos for details. Measures aprox 3" tall 2 1/4" wide Locking rollover clasp Bob Mackie began selling his wearable art collection on QVC in the 1990s, expanding from a costume designer for notable clients Cher, Diana Ross, Carol Burnett, Whitney Houston and others. Jewelry was high-quality works of art, and his brooches became highly collectible.