The Golden Healer / Iron Oxide Herkimer Diamond
On occasion a Herkimer Diamond contains/appears yellow or orange, in some or all of the gem. This coloring is introduced naturally during its creation through iron in the ground. Sometimes the color is inside and out like the soul of the Herkimer Diamond while other times it is on the outside and if desired can be removed with iron out. The unique metaphysical properties of the Herkimer Diamond and the "Golden Healer” Herkimer Diamond can be explored at this and other websites:
https://www.crystalvaults.com/crystal-encyclopedia/herkimer-diamond