To collect gemstones for free, go rock hounding at old mines and quarries on public land. To find these public sites, ask for details at a local rock shop, look for mineral collecting books or visit the state's department of natural resources website.
Take digging and collecting supplies when searching for free gemstones, such as a chisel, hammer, three-pronged gardening tool, a shovel or spade, gloves and a small bag or larger tote bag for carrying gemstones.
Always be aware of surroundings when searching for gemstones, and put safety first. Sites, such as abandoned mines and quarries, have certain risks along with the potential for finding gemstones. Tunnels can cave in and falling rocks can break loose and fall on unsuspecting or unprepared rock hounds.