It is difficult to determine the exact cost of Spains Marron Las Monjas Andesite stone without specific information on current market prices. However, Andesite is generally considered to be a more affordable type of stone compared to other natural stones like marble or granite. The cost can vary depending on factors such as the quality, size, and availability of the stone, as well as location and shipping costs. It is recommended to consult with suppliers or stone experts for accurate pricing.