Not sure if this is related to your quest, however I came across this info while researching Mayan culture:

…ancient skull weighing 5.13 kg…made of a whole crystal….contradicted the laws of physics….The skull was first discovered by the expedition headed by famous English archeologist F. Albert Mitchell-Hedges in Central America in 1927….Hewlett-Packard experts say …"The damned thing can't exist at all. Those who had done it had no idea of crystallography or of fiber optics. The people completely ignored the axis of symmetry, which was to prevent the crystal from splitting during processing. It is strange why it didn't split at that!" No matter how unbelievable it may seem, the strange crystal skull can be seen in the Museum of American Indians.

www.wintersteel.com/Crystal_Skulls.html
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13 crystal Maya skulls will save the world 18.09.2006

Ancient tribe of Maya passed on a legend that tells of the 13 crystal sculls able to save the world from a terrible catastrophe.

Once in 1927 a British archeologist Mitchell-Hedges was able to confirm the Mayan legend through his own discovery: when the man was clearing debris from atop a ruined temple at the ancient Mayan city of Lubaantum his daughter found one such skull made out of pure quartz.

Later a few more of these mysterious artifacts came into possession of people in different parts of the world. Places where the human sized ancient crystal skulls have been found are generally various ruins and many are guarded by descendants of indigenous people throughout the world.

The skulls have mystical qualities: they can bring their owners into the state of hypnosis, cause people to hallucinate or have dreams about ancient Indians. Some say they can even make wishes come true.

According to the Crystal Links research a conservator and restorer Frank Dorland studying one of the skulls discovered that it had zygomatic arches acting as light pipes, using principles similar to modern optics, to channel light from the base of the skull to the eye sockets.

The eye sockets in turn were miniature concave lenses that also transferred light from a source below, into the upper cranium. Finally, in the interior of the skull was a ribbon prism and tiny light tunnels, by which objects held beneath the skull could be magnified and brightened. As a result, when placed upon a source of light, the skull acquired glowing eyes and appeared to be on fire.

Yet the origins and the manufacturing of the skulls remain inexplicable. World Mystery Research Center reports that several of ancient skulls have been brought to Hewlett-Packard, located in the San Francisco area. Hewlett- Packard, long known as a manufacturer of printers and computer systems, has one of the most extensive scientific and crystal research laboratories in the world.

The scientist working at HP, who had a chance to work with some of these ancient crystal skulls were hard pressed to explain how a primitive culture could have carved crystal into such precise shapes and especially against the natural axis of the crystal without the use of sophisticated tools!

Thus far, four types of ancient quartz skulls are known including clear quartz, amethyst (purple), rose quartz (pink) and smoky quartz (from grey to black). It may be that these magic gifts of the ancestors would assist humanity in surviving the doomsday of 2012, as was foretold by the enigmatic Maya civilization.

www.wintersteel.com/Crystal_Skulls.html

i recently saw a short film on youtube called 2012 "the Mayan calender conspiracy" part 1 of 2. it claimed that pacal was made up by the monks who concord the area, and that his prophecy was fictional as well. I know there exists a sarcophagus. But has a body or tomb been discovered? the really odd thing is that not only does the reference web site in the video no longer exist, but I can not find part 2 of 2 or any discussion of this topic on the web. Usually when a claim like that is made it gets repeated buy every conspiracy theorist out there.
any way is it possible that this is the "crystal" in your dream?