From a photo caption on MSNBC, 5/12/08:
Eighty Years of Exploration and Study Reveal the Secrets of Crystal Skulls … Maybe
Furthermore, Dorland claimed, HP could find none of the microscopic scratches on the crystal typically caused by carving with metal instruments. This led Dorland to hypothesize that the skull was roughly hewn with diamonds, with the detail work being done with a gentle solution of silicon sand and water—a near-impossible task he estimated would have required up to 300 years in man hours to complete. Dorland also claimed the skull originated in Atlantis and had been carried around by the Knights Templar during the Crusades.
But there is no documented evidence to support the claims of the skull’s exotic origins and some authorities have claimed that Mitchell-Hedges purchased the skull at an auction at Sotheby’s in London in 1943—an allegation supported by documents at the British Museum, which reportedly had bid against him for the artifact. That would also explain why Mitchell-Hedges apparently never spoke of the skull before 1943—even though he claimed Anna had found it nearly 20 years earlier. However, Mitchell-Hedges claimed he was actually buying back the skull after leaving it in the care of a friend, who put it up for sale at Sotheby’s.
There is also some doubt as to whether the tests at Hewlett-Packard were ever carried out, since no evidence of such testing has been provided by the company. Furthermore, later tests determined that the skull was carved using 19th century jeweler’s tools, making its supposed pre-Columbian origin even more dubious.
Crystal Skulls Unsolved Mystery