Moonstone Animated
"One night a beautiful woman with raven black hair entered my tavern. She carried no gold, but offered me this moonstone as payment. As an adventurer, you may find it more useful than I do."

The moonstone is the 550-day membership reward. Its inventory icon shows the current moon phase in Aberoth. When unengraved, Lysis buys the moonstone for 279 gold pieces and sells it for 2000.