Symbol Tiles (Article ID 101)
Abstract: Symbol tiles also referred to as natural tiles are all tiles except for Flowers and Jokers.
Question from a player: What is a symbol tile?
Answer from the NMJL: Symbol Tile, “(Also referred to as a Natural tile) – Any tile other than a Joker.”
Source: Mah Jongg Made Easy 2020 page 33 https://www.nationalmahjonggleague.org
Other answer from the NMJL:
“A symbol tile is any tile in the game with the exception of the flowers and jokers.”