Indeed, star getting this and though about sending and email to TL, but after using 1 of the 99 gems that I had, after trading a dragon that had that specific gem once more, I received a gem instead of a blank package.
When you trade a dragon before you accept the trading, you can see what he gives you, if you trade a rare that gives red gems and you already have 99 red gems, the red gem will not appear on the rewards that the dragon gives before trading it.
Another thing Regina, I know this is not the right thread, but since I'm seeing you around here I will post here, if you want to move the question, move to the right thread, but this is only a quick question.
I've been expanding on the new island that TL released and I cannot expand more to the right, I can only expand to the top now. I will post a picture from my phone.