By any chance do you have a date when the specimen entered the collection? Reason being, if it was in he 1980's, it would have been labeled "Putis IX Mine" or just "Touisst." They were first brought out by Victor Yount in 1982. Them an mass in the latter 1980's by Moroccan/European dealers. The date will tel the story. If it entered the collection latter in the 1990's -2000's it could be from Mexico at a locality called the "Mitchell Prospect in Mun. de Rayon, Sonora. Wulfenite similar to your specimen came into the Market at the Tucson Show during that time period.

Frank

Yes I think Morocco is most likely the origin of the specimen. Thanks everybody for their help, particularly Franks detailed reply. Frank the origin of the specimen is almost certainly the very early 1980s, as the collection has been in storage since then. There were also a number of other early 1980s specimen in the collection. Including this greenish yellow anglesite, pictured.

I do remember that some Moroccan anglesites had been treated to give color, I was wondering if anybody could advise me if this may have been the case with the pictured specimen? Again thank you everybody for your replies, very appreciated.

The Anglesites of this type all come out at the same time as the Wulfenites and the yellow-green type were alwat=ys in a Galena matrix. The off matrix ones were lager perfect crystals. In actuality the treated ones were of a clear Amber color and tended to be larger crystals to make greater profit. I never did see a red Anglesite in the 1980's. Also, I agree with Erik. I tend to use the labeling language that was provided with the specimen. In the 1980's all Morocan martial had a locality label in French and as I said before, had only two localities - Putis IX or Touisst!

Frank