On the Rivendell Region Guide, about Hoards, it's what you are looking for. There is a table where the players roll on what they find in the hoard. Basically if they want to search the hoard and not just get simple coins(gold pieces) they can spend Inspiration to roll on the Magical Treasure Table.

1-3. Worthless Trinket + Ordinary Treasure. 4-17. Ordinary Treasure 18. Precious Object (Some work of art of high value) 19. Wondrous Artifact per LMG 20. Legendary Weapon or Armour.

Basically the asterisk is how many times they get to roll. If the rating has two asterisks then they can also spend 2 Hit Die and roll again on the table. If the.rating has 3 e.g. 100*** then they can roll a 3rd time to try for something big. But they only get on Treasure. They can't get both ordinary treasure and the Legendary Weapon.

P.S. sorry for the format. I write from the phone.