Natural amethyst crystal knob/pull. The edges of each piece are electroplated (not gold leaf or gilded, which may rub off) with beautiful thick metallic gold No two are exactly alike Tighten with care. No additional hardware required Agate, amethyst, copper, brass 1.5" to 1.75" diameter 1.5" projection. 1.75" brass bolt. Can do silver and rose gold finishes also.