Antique solitaire button, with detachable shank which is released with a spring mechanism. The top looks like silver (unmarked and untested) with an engraved leaf design dividing the background into four panels. Two of the panels are bloodstone, dark green with flecks of red, and two are some kind of red hardstone. Backstamped WEST’S PATENT with the G West monogram. Nice quality

Size 3/4” (1.8 cm)