Are the gemstones natural? Each listing states whether a stone is natural, synthetic, laboratory-grown or a simulant, as declared by the seller. How do I know if a stone is treated? Every listing includes a structured treatment disclosure. "No indication of heating" is only shown when the seller declares it, and a laboratory report may confirm it. What happens if I win? Our team contacts you to arrange payment and shipping. Online checkout is coming soon. Can I retract a bid? Bids are binding. Contact support immediately if you made an error. Why was the auction extended? A bid was placed close to the end, triggering our anti-sniping extension.