NPT QuartzScapes® Caribbean QUARTZSCAPES ST. MARTIN SHADE St. Martin Shade Pool Finish Parent Kit - Finish your pool with distinction! QuartzScapes Caribbean Series St. Martin Shade creates dark blue water color and is comprised of dark gray pigmented white Portland cement, natural quartz aggregate and Cobalt Blue and Black T-Grade colored quartz highlights. Because natural quartz is ten times harder and more durable than marble, QuartzScapes is perfect for both commercial and residential installations.