Scattered throughout the Land of the Lost, often embedded in the walls of caverns, are a variety of colourful brightly-glowing crystals that the Marshalls dubbed "light crystals" and which Enik called "fourth-dimensional nodes." Sizes vary from boulder-sized chunks to the more common walnut-sized gems. Their most common colours are red, blue, yellow, and green, though other rarer colors, such as white, have been seen or mentioned.
The most common use of light crystals seems to be in crystal matrix control tables, or simply as sources of illumination. Altrusians used them as a power source for their technology. On their own, the crystals generally do not have special properties beyond their glow, but bringing two different-colored crystals together can cause additional effects in some cases:
* Bringing a red crystal together with a green one causes the pair to emit a blindingly bright but generally short-lived light (Holly used this pair for sustained light in "Elsewhen"); this combination is often useful for driving away Sleestak.
* Bringing red and yellow crystals together causes an explosion after a very brief delay.
* Combining red and blue do nothing noticeable, but adding a third, yellow crystal to the pair causes them to emit a fierce shock.
* In general, yellow crystals appear to trigger releases of energy from other crystals.
* A blue crystal and a green crystal together create a temporary force field a short distance away. This use was taught to the Marshalls by Enik in "The Stranger", but in the later episode "The Search", the Marshalls attempted to reproduce the effect and nothing happened. (It is possible the crystals they used the second time were insufficiently charged.)
* In general, blue crystals appear involved in telepathic functions. Blue crystals alone can under some circumstances hypnotize people into seeing what they love most. Jefferson Collie also mentioned that blue crystals "make you sick", and discards them when he mines them in his cave. The Marshalls eventually receive a set of pendants made from blue crystals that provide a sort of clairvoyance, in which one wearer can see what the other wearer is seeing and hear what they're hearing.
Land of the Lost Crystal info -
Scattered throughout the Land of the Lost, often embedded in the walls of caverns, are a variety of colourful brightly-glowing crystals that the Marshalls dubbed "light crystals" and which Enik called "fourth-dimensional nodes." Sizes vary from boulder-sized chunks to the more common walnut-sized gems. Their most common colours are red, blue, yellow, and green, though other rarer colors, such as white, have been seen or mentioned.
The most common use of light crystals seems to be in crystal matrix control tables, or simply as sources of illumination. Altrusians used them as a power source for their technology. On their own, the crystals generally do not have special properties beyond their glow, but bringing two different-colored crystals together can cause additional effects in some cases:
* Bringing a red crystal together with a green one causes the pair to emit a blindingly bright but generally short-lived light (Holly used this pair for sustained light in "Elsewhen"); this combination is often useful for driving away Sleestak.
* Bringing red and yellow crystals together causes an explosion after a very brief delay.
* Combining red and blue do nothing noticeable, but adding a third, yellow crystal to the pair causes them to emit a fierce shock.
* In general, yellow crystals appear to trigger releases of energy from other crystals.
* A blue crystal and a green crystal together create a temporary force field a short distance away. This use was taught to the Marshalls by Enik in "The Stranger", but in the later episode "The Search", the Marshalls attempted to reproduce the effect and nothing happened. (It is possible the crystals they used the second time were insufficiently charged.)
* In general, blue crystals appear involved in telepathic functions. Blue crystals alone can under some circumstances hypnotize people into seeing what they love most. Jefferson Collie also mentioned that blue crystals "make you sick", and discards them when he mines them in his cave. The Marshalls eventually receive a set of pendants made from blue crystals that provide a sort of clairvoyance, in which one wearer can see what the other wearer is seeing and hear what they're hearing.