Glass Beads
The technology for glass beadmaking is among the oldest human arts, dating back 30,000 years (Dubin, 1987). Glass beads have been dated back to at least Roman times. (Excerpt from Wikipedia: http://en.wikipedia.org/wiki/Glass_beadmaking)
The following are the types of glass beads I most commonly incorporate into my Jewelry-Artwork:
Boro beads are beads made from borosilicate glass, a very hard, durable glass which was originally developed for laboratory glass and cookware. Borosilicate beads are, as a result, very durable and hardy, and they can be used in a wide variety of ways... Art glass boro beads can be extremely elaborate, and sometimes quite costly. They typically feature a swirl of colors, and they may vary widely in size; because such beads are hand-blown, they are typically one of a kind. When a glass blower sits down to make a set, he or she makes the entire set at one sitting, to keep conditions as consistent as possible, thereby ensuring that the beads will match, even though they all look slightly different. (Excerpt taken from WiseGeek: http://what.skyaga.com/what-are-boro-beads/).
Dichroic glass is being used to produce high-end art beads. Dichroic glass has a thin film of metal fused to the surface of the glass, resulting in a surface that has a metallic sheen that changes between two colors when viewed at different angles. Beads can be pressed, or made with traditional lampworking techniques. The metal coating used was originally developed by NASA for the space program.
Fire-polished beads are faceted glass beads made in the Czech Republic or (more recently) China. They are faceted by machine and then drawn through ovens to make the surfaces molten, and thus shiny when the beads cool. This method of "polishing" is faster and cheaper than buffing and results in a reasonably attractive bead, though generally less perfect than buffed beads.
Goldstone is a type of glass made with copper or copper salts in the presence of a reducing flame. The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone; in fact, goldstone is often mistaken or misrepresented as a natural material.
Pressed glass beads are formed by pressing the hot glass into mold to give the bead its shape. Often pressed beads are made using machines that stamp the shape from the molten glass. The shapes can have holes punched in virtually any direction. The Czech Republic is the primary producer of pressed beads.
Seed beads are uniformly shaped spheroidal or tube shaped beads ranging in size from under a millimeter to several millimeteres. "Seed Bead" is a generic term for any small bead.
*(Excerpts on bead types taken from Wikipedia: http://en.wikipedia.org/wiki/Bead).*