Quartz aggregate 1)natural stone gravel 2)verious color and size 3)local source, own quarries 4)high quality, low price 1. Material: natural stone gravel 2. Gravels color: white, red, black, yellow, green, grey, brown, and so on. 3. Gravels size: 3-5mm, 5-8mm, 8-12mm,mm,mm,mm,mm, or as customers require size. 4.