Moonstone 20mm is a very hard-wearing flint gravel consisting of a mixture of distinct colours, including black, grey, brown and creamy white. Uses for this striking product include drives, paths and decorative landscaping, and as it is a fish-friendly product, it is also popular for water features, ponds and aquatics. The actual size of the product is 10–20mm and as it is a naturally quarried product, it can vary in size, shape, and colour.