Potomac Miyuki Tila - Opaque Collection. Uncover the secrets of beadwork with Miyuki Tila Beads – an extraordinary creation by Miyuki in Japan, developed after years of meticulous research and production methods that remain a top secret. The Tila, Half-Tila, and Quarter-Tila beads introduce a new dimension to the DIY beading and jewelry-making world, offering endless possibilities for your creative endeavors.