Turquoise (?) Cabochon

To be perfectly honest I am not quite sure this is a turquoise stone. It has similar colors and veins, but I’ve never seen anything quite like it and that’s why I purchased it years ago. It would make an absolutely beautiful pendant. It’s 45 mm long the bottom measures 15 mm wide and the top measures about 7 mm wide and it’s 4 mm thick. It’s an absolutely beautiful stone I just can’t guarantee what type of stone it is. I’m hoping that there is a gemologist who sees this And can tell me what it is!. Regardless, it’s really a beautiful cabochon all the way around. Sidenote, check the last photo as I just tried to figure out what this stone is on a gem finder app. It tells me it’s turquoise! I’m still not quite convinced! I’ve been making jewelry since the late 70s and I’m born and raised in Arizona or turquoise is king! It truly is a stunning cabochon. If any other gem geeks out there have opinions on what this might be, please let me know!