This 4-10mm golden stone adds warmth to any area of your garden. These decorative stones are perfect for your alpines & rock gardens as well as plant pot toppings. Summer gold chippings are also fish friendly making them suitable for all aquatic use (wash prior to use). The weight given of 9kg is an approximate weight. Significant variances to weight can occur due to the nature of this product. Products made up of natural materials will vary in size and colour, some significantly.