Board Thread:General Discussion/@comment-26612539-20150715125723/@comment-26282536-20150804024051

KAPompom wrote: One over the other would result in a gemstone doublet. (if you dont know what a gemstone doublet is search it up) Or they'll probably get two heads or two faces on a head. That would be cool, but the current canon answer is having two gems side by side. This might change, though.

source: https://twitter.com/mcburnett/status/621326274175197184