Citrine Chalcanthite so obviously there are some

so obviously there are some inconsistencies in the literature

but it was difficult to illustrate in the photos

Austria and Pakistan

but it turns out that a large percentage of the material that has been labeled as Amblygonite over the decades is more than likely Montebrasite

Citrine Chalcanthite so obviously there are someCitrine is well known in the gem world, but a large percentage of Citrine gems on the market have been heated to turn them yellow. Typically, these stones start out as natural Amethyst and are altered to create the yellow color. This practice is perfectly safe and accepted in the gem world, provided the buyer knows they are purchasing a heated stone. This particular stone was more than likely an Amethyst that was heated to create the color. With that