This is a vintage gold-tone koala bear stick pin featuring an oval opal or opal triplet stone, commonly produced as an Australian tourist souvenir or travel accessory. 

Item Overview

• Design: A textured, gold-plated or gold-tone figural koala holding an iridescent oval stone that resembles an opal. 

• Function: Used as a lapel pin, hat pin, or tie/cravat accessory, typically measuring around 1.7 to 1.75 inches long. 

• Era and Origin: Often associated with Australian souvenirs from the 1980s and 1990s, with some variations linked to promotional items from carriers like Qantas Airways. 

• Estimated Value: Pre-owned vintage listings on online marketplaces like Etsy and eBay generally range from $12 to $35 depending on the stone type and overall condition.