This type of murrine is used by adding small dots of clear right on the top and heating gently so the petals open outwards, once you placed it in position on your focal bead. The very centre (stamen) is made up of small lengths of Filigrano Rod that are clear on the outside with a yellow core. you can purchase this from Tuffnell Glass and other good suppliers. http://tuffnellglass.com/contents/en-uk/d308_Effetre_104coe_Filigrano_Rods.html Click link above or copy & paste into you browser.