The cost of quarry stones in Kenya can vary depending on several factors, including the type of stone, the location of the quarry, and the market demand. As of my last update in 2023, on average, the price can range from Ksh 25 to Ksh 40 per piece for machine-cut stones. Manually cut stones might be slightly cheaper. For bulk purchases, discounts may apply. It's always best to contact local suppliers or quarries for the most accurate and up-to-date pricing.