This appears to be a vintage gold-tone stick pin featuring a polished, multi-pointed starburst design.

An unmarked, 2.25-inch vintage gold-tone costume jewelry stick pin like this typically has a market value of $5.00 to $15.00.

The value of this stick pin with its end cap remains $5.00 to $15.00.

The inclusion of the removable end cap (or clutch) completes the piece and makes it wearable, but it does not increase the market value of the pin. Buyers and collectors of vintage costume jewelry expect stick pins to include their original or a matching safety cap, so its presence simply helps secure a sale at the standard market rate rather than adding a premium.