A sterling silver bar brooch weighing 2.0 gm with central gemstone believed to be Blue John

A sterling silver bar brooch of minimalist design. The piece comprises a straight rectangular bar with a central oval rub-over setting. The setting houses a polished cabochon of Blue John fluorite, exhibiting characteristic mottled patterns of cream, yellow, and deep purple hues. The reverse of the bar is stamped with the mark 925SIL, indicating a silver purity of 92.5 percent. The brooch is secured with a hinged pin and a simple C-clasp.