The Birch Bark Collection is handcrafted from naturally fallen White Birch Trees on our Wisconsin homestead. The selected bark is cleaned, cut and sealed for preservation. •Created by mother nature, crafted for you-niqueness• . The added moss has also been preserved to hold the natural color & texture. . Assorted Variations... Characteristics, patterns & texture will vary, as nature dictates. . 10mm earrings are bronze plated metal.