|Oro Verde citrine to be more accurate. This stone may have been heated or irradiated depending on where you get your information. One thing is clear ... Oro Verde citrine is enhanced one way or the other. The first story that I heard said it was created by heating some smokey quartz crystals. I purchased some rough crystal with phantoms that look like smokey quartz. The material come from Brazil and is a pleasing light yellow to yellow-greenish color.
This stone cut by the author using a pattern from one of the Vargas books. It's a nice material and available in larger sizes.
For excellent information on heat treatment of gemstones:
The pictures below the diagram show the original rough.