The monmon seed was a special seed from Endor. When properly collected and polished, they made for a lucrative trade item.
Wicket Wystri Warrick prepared such a supply for the annual village expedtion to Mooth's trading post. Mooth was interested enough to offer the young Ewok a "lucky" stone, which he gave to his loved sweetheart, Princess Kneesaa a Jari Kintaka.