Premium Heavy Duty Welsh Quartz and Granite Boulders 700mm to 850mm for Garden Features and LandscapingProduct Uses The boulders are heavy and can be used as features in a pond, rockery, or waterfalls. They can also be used as standalone pieces on gravel or within planting areas. The boulders have a rugged texture that is both eye catching and durable. When wet, the granite and quartz take on a fantastic sheen that is sure to add a touch of elegance to any garden. These boulders can be the perfect centerpiece to your dream garden. Dimensions &