NPT QuartzScapes® Caribbean QS GRENADINE GRAY 1/2 Grenadine Gray Pool Finish .5 Parent Kit - Bring the beauty of the deep blue Caribbean sea to your own backyard with QuartzScapes Caribbean Series finishes. From Aruba Sky to St, Martin Shade, these vivid hues will give you the island views you've always dreamed of. Natural and colored quartz are ten times harder than marble.