Star Trek: Enterprise (2001–2005) - Dilithium Crystal.; Used in the 19th episode of season two titled "Judgment". After Enterprise lends aid to a group of accused rebels, Captain Archer faces a tribunal and charges of conspiring against the Klingon Empire.; Measuring 7 X 1.5 X 5, this prop was originally sold at the official Star Trek online auction in 2006. Now, you don't have to break Klingon law to get your hands on this incredible dilithium crystal.; Original piece of dilithium crystal used on the science fiction television series "Star Trek: Enterprise" (2001–2005). A century before Captain Kirk's five-year mission, Jonathan Archer captains the United Earth ship Enterprise during the early years of Starfleet, leading up to the Earth-Romulan War and the formation of the Federation.