Gypsum


 * "The saying refers to a weak-willed person who gives up easily."

Gypsum is a common Mineral that is only found in Treasure Hunts of Dillon's Rolling Western: The Last Ranger. This  material is only used to sell to Sal when collected in treasure hunts.

Trivia

 * The description references the saying "He has a gypsum heart," as gypsum is a weak mineral.
 * Gypsum is based off of the actual mineral composed of calcium sulfate dihydrate (CaSO4 2H2O).