d20 Future: CODEX GALACTICA
The Ancients known as the Glassmakers are a seemingly extinct species that colonized many systems throughout the sectors that make up the stellar region known as Northern Shadow Space. The planet of Titanic Shadow Space has the highest concentration of Glassmaker sites, with dozens of complexes scattered throughout the planet. Glassmakers are called such because their technology consisted primarily of energy conducting substances not unlike glass. However, the “glass” created by the Glassmakers is much stronger and resistant to damage, with a tensile strength on par with advanced steel alloys. They were also adept as the creation of constructs made from these substances as well.
(Taken from the Alternity Alien Compendium by TSR)