Rarity

Rarity is the level of how often an item/block is seen.  EXAMPLE:

(0)
Something that is seen very often. (i.e. Pudding, Flour)



(1)
Something that is seen often. (i.e. Chocolate Stone)



(2)
Something that is not seen very often. (i.e. Jelly Ore, Licorice Ore)



(3)
Something that is seen barely. (i.e. PEZ ore)



(4)
Something that is seen very rarely and is rare to get. (i.e. Jelly King's Wand, Jump wand)