Synthetic Diamonds

I mentioned at lunch that a company offered a service to turn the cremated remains of your loved ones into synthetic diamonds. I incorrectly said that they're called "Soul Gems" (these are instead from the computer game Morrowind/Oblivion). The real name is "Life Gem".

Someone at lunch wondered whether the company actually transformed the ashes you send them. This possibility has also been raised by the snopes urban legend site...