@engineerevan: There is absolutely no difference between grey machine cut stones and yellow machine cut stones in terms of strength, size accuracy, or performance. The cutting process is the same, the dimensions are the same, and the structural role they play is the same, tofauti iko kwa color pekee and personal preference. What really matters is proper planning, correct mortar ratios, and good workmanship on site. Plan better, build better. Call or WhatsApp 0715822552. #houseplans #engineer #architect #siteinspection #planbetterbuildbetter