40x30mm Imitation Turquoise Robins egg blue - sky blue cabochon S4028

This is an imitation Turquoise. Feels like a stone, not sure what the stone is, often this is dyed howlite. I see fire mountain gem calls the same stone turquoise (assembled). The stones are very consistent in terms of color. The little crack lines will be unique to each stone but color and also size seem to almost exact between each of them.  I tried finding real 40x30mm turquoise not an easy task. Looks like maybe real ones are 10 times the price.