An Amaranth is a golden sphere about the size of a Cricket ball. It serves to stabilize the interior of a TARDIS from the de-rationalizing effects of the Eye of Harmony. It is capable of rebuilding small areas of the Universe along rational lines using its own very high Reality Quotient. If the Amaranth finds itself surrounded by a dangerous amount of irrationality, it will teleport its user to a safe location. The Amaranth (or similar technology) might also be used by the Chaotic Limiter in a War TARDIS to alter the reality quotient of time travellers.
The following color code is used:
- Black: For information from the TV Series, including Dimensions in Time, and 1996 TV Movie.
- Blue: For information from the Novels and Audios including Target, Virgin, BCC, and Big Finish.
- Green: For information from 'licensed' reference sources such as the Technical Manual, Doctor Who Magazine, and the Role Playing Games.
- Red: For information from unofficial sources -The Faction Paradox series, behind the scenes interviews, author's speculation, and popular fan belief.
The TARDIS Technical Index is copyright Will B Swift.