I think it is by using a chisel or hammer on the gems.
You get five gems for winning first place. You get 2 gems for winning second place. Select a dragon that is at least partially from the element the Colosseum is using that day.
You can get them by using gems together.
Breeding light dragon with earth
First go to Wizards Domain.Then, you put in the gems. The gems are the green gem,the blue gem,and the dimond!Hope you get it!! Enjoy!I got it from using these gems but you may not get it! (Hint:Only members can use it!)
You either have to pay using paypal, or you can get gems for free of mobile phone. You can earn them here:http://captchatrader.com/users/refer/debbiesh99
You cant get a gold dragon without gems you need to be a memmber i think and i think your dragon can be other colors
You find gems in every island by either digging using your metal detector or mining in a mining place which is also in every island an you find several gems in one place. Hope this helps. :)
You have to use a Fire and Water Dragon
To breed more than one dragon at a time, you will need to buy the epic breeding island. This costs gems, so you will either need to save the ones you win by various means, or buy them in the market.
Help his friend celio get two gems so you can trade with hoenn games!
Cold left firefly right