I noticed a couple of gem-related glitches.
first, the achievements - i've shipped TONS of polished gems, and my Steam achievement counter still shows 0. that can't be right..?? and secondly, the placements of the gems in the museum. most are fine, but several are glitching strangely. here are some screenshots...
the third from the right sometimes appears white, sometimes blue...
(occasionally depending on the angle)
the red one's outside its box, and the two on the right are inside each other
and two more inside of each other here, as well as one unprocessed one for some reason??