Formulated by Legor® Group, this basic red master alloy is a universal alloy ideal for two-tone or three-tone jewelry production. This alloy is not recommended for stone-in-place applications. A master alloy casting grain is a pre-formulated mix of base-metal elements; add the appropriate amount of precious metal grain to the master alloy to create the casting alloy you need. Sold by the troy ounce (ozt.).