Board Thread:General Discussion/@comment-26198832-20150313023659/@comment-10583149-20150430225005

I agree that Gems are manufactured. My theory is that the machines in the Kindergarten are used to implant DNA into a specially cut gemstone (gemstones definitely do not come cut like they are naturally). On Earth, there are only 200~ types of gemstones. The Kindergarten definitely has over 200 holes.

Then there are organic gemstones, which are gemstones not formed in the ground. These are: Amber, Ivory, Coral, Jet, and '''Pearl. ''' My theory is that these are servant Gems, created by the Homeworld to do their bidding. They're a sub-species of sorts. That's why Pearl was called defective by Jasper; Pearl was independent from the Homeworld, and defected.

(Also, Pearl, in Rose's Scabbard, says says "My Pearl". That seems odd, doesn't it? That's where this theory comes into play.)

TL;DR: Certain gems are mass-produced in the Kindergarten (like Amethyst), and some are mass-produced on the Homeworld (like Pearl).