Enhancing Gems are items used as materials to increase the rank of cards at the Alchemy Lab. These items can be acquired in various ways, though some are much harder to come by.
Pink Diamond Edit
Pink Diamonds enhance cards of Rare and lower rank to Epic. These are the most common gems and can be acquired in the Daily Activity Rewards at 70 points.
Fire Opal Edit
Fire Opal enhance Epic cards to Legendary. They can be bought from the Tower Shop for 98 or acquired as an Item Collector event prize.
Fire Ruby Edit
Fire Ruby enhance Legendary cards to Godlike and requires a Level 15 Alchemy Lab. They can be obtained through some Daily Login Rewards, in Gold Rush events after consuming 30k , as an Item Collector event prize, and other special events.
Black Opal Edit
Black Opal enhance Godlike Elite and Skill cards to Awakened and requires a Level 15 Alchemy Lab. These are the most difficult to acquire. They can be obtained in Gold Rush events after consuming 50k , at a Black Friday event for around 15k as a direct purchase, Item Collector event prize chests, and other special events.
Black Opal Fragments Edit
Black Opal Fragments can be combined into a Black Opal if x99 of them are acquired. Fragments are rewarded for obtaining at least 800 points in Supremacy events.