Granite enclosure

If you want to know what kind of prices they are research acora except I am here in America akora is Canadian based so they would be more affordable and no tariffs it all depends on what material and color you're looking for and design prices are comparable and competitive with focal Wilson audio b and w etc accept the design is variable and your input makes them customizable

In other words, very expensive.

Expensive sure but less than acora or focal or Wilson audio considerably but with better performance and durability 

I like how someone who wants to sell something really expensive uses the cheapest marketing that they can come up with. At least work on the grammar. 

I always thought Granite cabinets might sound good and be cool.  I can imagine going to GR Research and buying their NX-Otica DIY kit, then, sending the flat pack cabinet kit to @earthtone to create the granite cabinet mimicing the flat pack.  Not sure what the outcome would be, and I am not in the market for speakers (happy with my Wilsons), nor a DIY speaker guy, but, it just got my imagination going.