There were three known existing sapphires. One was in the Conquest of Space Museum on Terra, one was in the hands of United System President Polonius… - Michael Moorcock

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There were three known existing sapphires. One was in the Conquest of Space Museum on Terra, one was in the hands of United System President Polonius Delph—he was the richest man in seven worlds, or had been until he’d paid cash for his jewel. The other had been stolen soon after its discovery. Maybe Delph had it...
“From what I understand of your world, Delph isn’t the only one who wants the sapphires. He has rivals in the Plutocracy. Another mysterious collector? Or those rivals are competing for the presidency or they think they can ruin him. As you know, it’s a vicious circle in politics. You can’t get to be president unless you have the wealth and you can’t really make massive sums until you’re president.”