Black Washed Sand. Silica sand comprises fine bits of quartz and different minerals like salt, sediment, silt, clay, dust, and different powders. Washed sand goes through a cleaning or “washing” process that eliminates these extra substances and other undesirable particles from the sand. Washed sand is great for rendering, they’re generally grouped by the size of their granules which are medium, fine, coarse and ultra-fine.
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