Silk Birch Tree Branches. Silk tree branches are great for replacing your older branches with new silk tree branches to give it a new look or if you just want to make your own silk tree. Artificial silk tree branches are not made from real silk. Silk branches are made from synthetic fabrics, plastic coated iron wire and are not made of any real silk. Silk Tree Branches come un-shaped. We try our best to accurately display the colors of the products shown on our website. However, depending on your monitor, we cannot guarantee that your monitor's display of any color will be accurate.