Please Help With Hallmark and Type of Turquoise

Been struggling with this hallmark. Is it an “A” or is it “AJ” vertically? And then whose might it be? The A is very stylized. Be grateful if anyone had an opinion. Also, the stone. It’s an almost for a number of pictures I’ve looked at - so I’m stumped. The matrix looks a touch browner in person than in the picture


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You have a tough one there, I have seen this called Number Eight and Turquoise Mountain. Couldn’t find anything on the hallmark.