Assorted Polished Agate Bookends - Choose Your Color Uniqueness Guaranteed: Every item is one-of-a-kind, making them ideal for all projects or designs. Listing is for (1 Matched Pair) Avg Size Range: (3 To 6 Inches) Sizes Vary Material Origin: (Brazil) Agate is a banded variety of chalcedony that forms inside pockets of metamorphic and volcanic rock, with the initial layer that forms and the surrounding minerals and conditions affecting subsequent layers and giving agate its wide variation in appearance. Agate can also bond with quartz crystal while forming, which can lead to distinctive white banding and exposed crystal druzy. 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.