https://www.qld.gov.au/recreation/activities/fossicking/rules/permitted-activities/
Sale and trade of collected material
You can sell the occasional lucky find of a gemstone or sell and trade to hobbyists or through fairs and exhibitions. However, repeated removal for sale through shops or businesses, or as part of making a living, is considered commercial, and requires tenure under theMineral Resources Act 1989.
Royalties are payable on fossicking materials that are the property of the Crown, but threshold exemptions of $100,000 mean that generally most fossickers are not liable.