Delica® Bead - Brand name for a variety of seed bead manufactured exclusively by Miyuki of Japan, using computer-controlled machinery to create extremely consistent beads. Delica seed beads are the same size in all dimensions, with large holes and thin walls. Some beads will be smooth cylinders, others will be six-sided "hex-cut" beads. Delica seed beads are popular with bead-looming and bead-weaving projects, as they create a finished product with a smooth and consistent surface.
Dichroic Glass - A glass material containing ultra-thin layers of metal oxides. The micro-layers of metals and metal oxides create different layers and patterns of light refraction within the glass, causing a variety of colors to be displayed. Different angles of view alter which colors are displayed within the glass.
Donut - A flat component, usually round but also available in other shapes, with a large center hole. Named after the bakery doughnut, the donut component is most commonly used as a jewelry centerpiece.
Drop - A component within a piece of jewelry which dangles from another component or the main body of the jewelry and moves with motions of the wearer. A drop has one top loop or hole and any range of bottom loops or holes--including none.