This type of sand around in the lowlands of the rivers originating from the Dai tides from various partners came to blows, sedimentation in lowlands as source of sand used a clean sand construction because it is the pill have different size then coasted through the sieve applied in the construction of masonry structure, such as crabs, birds, sur whirlpool River sand sat with a mixture of. Organic substances. Available colors: black, dark brown impurities, used in the construction of Miami Dai but be sprinkled on the soil before using land reclamation and the lawn because there is a price to be called sand reclamation.