On March 20, 2020, the Diamond Dragon was added to Adopt Me! alongside with the Diamond Griffin and the Diamond Unicorn as part of the Star Rewards update. It is obtainable through hatching the Diamond Egg or through trading with other players in Adopt Me!. The Diamond Egg is in fact the final reward of the second phase of the Star Rewards. It takes around 14 months of logging in daily to receive a Diamond Egg. Players have a 1/3 (33.3%) chance of getting a Diamond Dragon from the Diamond Egg.
It is mainly a golden and blue re-coloration of the Dragon. It has a diamond body with golden claws, golden horns, and golden wings. The other diamond parts of this pet are the sinew and two diamond fangs. Finally, the look is completed by its two black eyes.