Silicasca was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, in orbit of the Silicasa star system, at coordinates 3.78N 2.08W.

In the 23rd century, Silicasca was home to a Vulcan colony, a noted center of culture. By reference stardate 2/2306.01, the world had a population of 3.65 billion individuals, mostly Vulcan, and the government was a full-status colonial member of the Federation. (FASA RPG module: The Federation)