Our floral blocks are hand-crafted with preserved flowers in resin. Thickness varies from one to three inches thick, depending on the flowers and molds. All flowers used in resin bouquet preservation go through our Flower Beautification Process to make them look as close as possible to the way they did when they were fresh. All epoxy will yellow; however, our casting resins have UV inhibitors in them that will delay the change in color. We recommend not displaying them in direct sunlight. Refer to our FAQ for more information.