Tumbled Garden Quartz Uniqueness Guaranteed: Every item is one-of-a-kind, making them ideal for all projects or designs. Listing is for (choose your quantity, 1 pound, 1 kilogram) Avg Size Range: (20 to 40 millimeters) Material Origin: (Brazil) Quartz is one of the most common minerals found in the Earth's crust, and takes on a variety of colors depending on the other minerals and trace elements that are included as it forms and grows. These pieces are formed primarily of rock crystal and white quartz, the latter taking its color from very small inclusions of fluid or gas while it formed. Custom Requests: Have specific preferences? Leave a message with your order, and we'll do our best to accommodate your requests if possible. Handmade items vary in size, shape, and color when selected randomly (the highest quality items are chosen first). They'll be as beautiful as those in the photos.