Hello,
What you have is block, not rough. Block is a composite of synthetic materials, and it may not have any actual turquoise in it. “Rough” is actual turquoise from a specific origin prior to it being transformed into use for jewelry or other forms by lapidary work. Here’s some discussion:
Quailty and cost of block obviously aren’t in the same ballpark as turquoise rough; “quality” of block may be hard to discuss given that it shares no properties with turquoise the mineral.