After 40 years of stone it’s all art and detail now. I install the Mirco Ledgestone with Ardex x32. And waterproof my scratch coat with Ardex 8+9. I do not use black dye rather cut and fit the stone so you do not see mortar. It is a very concise system awesome for backsplashes and indoor and outdoor feature walls. Basically it is free cut Ashlar when it is finished and extremely stunning. Drop me a line for a quote