This is a floral stick pin featuring carved purple stone petals and green leaves, accented with a "Genuine Stone" seal tag.

The back photo shows the reverse construction of the flower setting. The carved purple amethyst petals are mounted onto a gold-tone, five-petal filigree backing, which anchors the center wire and connects directly to the long stick pin shaft.

The estimated market value for this vintage floral stick pin is $15 to $35.

This piece is categorized as vintage fashion/costume jewelry. Its value is determined by a few specific factors:

• Materials: It features genuine semi-precious carved stone (likely amethyst or dyed quartz) set on a gold-tone base metal rather than solid precious gold. 

• Packaging: Having the original "Genuine Stone" tag and presentation card intact acts as a minor value multiplier for vintage collectors.

• Market Rarity: Unbranded or department-store costume stick pins from the mid-to-late 20th century are common on platforms like eBay and Etsy, usually selling in this modest price bracket.