"The point is," said Don Donald, "that it works . Put a magic gem in a story and it grabs the reader. This can be done shamelessly, or with more or less artfulness, according to the tastes and talents of the author. I should say that Tolkien got it right by layering atop it a story about good and evil. The numinous mineral object is now also a technology; it has been imbued with power by a sentient will who possesses some sort of arcane wizardry. It can only be unmade by exposing it to a certain geological process that, being geological, is prior to, and takes precedence over, any work of culture."