They're lampworked glass beads in iridescent metallic hues in two tones (the bead will seem like that of two colours when checked out from distinctive directions). You may as well obtain a variety of crafting and jewellery beads with various models. This is certainly what helps make beads so versatile. https://yellow-beads-types43185.blogvivi.com/31533446/5-tips-about-yellow-beads-types-you-can-use-today