This is a unique and special piece of petrified wood rough from the Columbia River in Eastern Washington. The agatized and opalized chalcedony agate collection is truly a sight to behold. The rough material is perfect for cabbing or lapidary work,or a must have for a collection or display. The piece is a great addition to any collection or cabbing materials, and it's perfect for those interested in geology and fossils. This item is a must-have for anyone who wants to add a touch of natural beauty to their collection.