alright so, as I was playing dragon vale. and have no gems at all. something like (O) gems on my account linked to facebook. there are only a few steps to follow. 10/10 working. you won't regret it. but first visit this page www.facebook.com/javshizon/ and click subscribe!!
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Here are the following steps to earn 10 gems. take note. the minimum gems you can get is 10. but mostly 12 is max. haven't tried to reach 14 or 15 yet. but if you're having a hard time waiting for breeding process to finish you can do this for 11hours breeding or lower.
First step = Open your Dragonvale Home or island.
Second step = click options.
Third Step = you will see a Logout button right at the bottom part of the opened tab on your screen.
Fourth step = Wait for few seconds and dragonvale will restarted and you will go back to the beginner section where you have (10) gems in the beginning.
Fifth step = now, just click the Option again, and Click Log in.
now some pop up will appear etc.... whether to pick "LOCAL" or "FACEBOOK" now click FACEBOOK. and you'll be logged back in with your current Farm with a stock of 10 gems.
) Repeat it. for beginners only.
Hope it helps!