Talk:Gem Homeworld/@comment-29677994-20160909144439/@comment-28750595-20161016121343

well pearls are made of "a pearl is composed of calcium carbonate in minute crystalline form, which has been deposited in concentric layers"  so it's possible that they are made in kindergartens rich in that mineral.

Also you can get artificially made pearls, so maybe they use a similar process