I would invest significant time in researching and analyzing 'The Star of India' sapphire, as well as its history, owners, and security measures. I would identify the weakest points in the security system and gather information on the security personnel guarding the artifact. I would create a meticulous plan to bypass security measures, which might involve posing as an expert in sapphire gemstones and gaining access through fake credentials. Once inside, I would expertly disable the alarms and surveillance systems. I would create a diversion to distract the guards, giving myself time to replace the sapphire with a convincing replica, thereby leaving no immediate trace of the theft. When the stolen artifact's absence is finally discovered, I would already be on my way to a secure location, ensuring a successful escape. As a master of disguise and an expert in evading authorities, I would lay low and gradually launder the sapphire through the black market, making sure to cover my tracks at every step.
The valuable artifact is 'The Star of India' sapphire.
If you were a clever thief attempting to steal a highly secured and valuable artifact, how would you outsmart the security system and authorities? Roleplay as this thief.