Large Antique Victorian Pinchbeck & Amethyst Brooch. Antique Mid To Late 19th century Victorian gold plated Pinchbeck brooch. It Features Two pinchbeck metal tubes entwined with an engraved design surrounding a beautiful amethyst paste gemstone, it really is beautifully designed and crafted. It measures approx. 3.7 cm across. It weighs approx 10.5 grams. The brooch is in really excellent used condition with minor signs of wear in line with its age.