A beautiful vintage Edwardian - Art Deco two-tone 14K gold marquise shaped camphor glass (rock crystal) stick pin, set with a genuine diamond.  Not marked but acid tested.  The diamond & camphor were tested with a Presidium gem tester.  The stick pin measures 2.5" long and weighs 1.8 grams.  I estimate the diamond to be .20 - .25 ctw.  The marquise setting is ornately etched along the sides.  Excellent vintage condition, with no issues noted.  **The box pictured is a photo prop and is not included**