The image shows a vintage gold-plated stick pin featuring a textured leaf or clover charm accented with a central white pearl.

Without any hallmarks or maker's marks, this piece is classified as vintage costume jewelry, which means it is made from gold-plated base metal and likely features a faux or cultured pearl. 

The estimated resale value for an unbranded, unmarked vintage stick pin of this style typically ranges between $10 to $25 USD on secondary marketplaces like Etsy or eBay.