This gem contains the magical essence of a dragon, subtly glowing the same color as the dragon once had. As an action, you can attach the shard to a Tiny object (such as a weapon or a piece of jewelry) or detach it. It falls off if your attunement to it ends. The essence of this crystal depends on what type of dragon it was from, which must match your own color.
When you use a Metamagic option on a spell while you are holding or wearing the shard, you can make the essence amplify your magic. The target takes 7 (2d6) extra damage of the type associated with the draconic essence, and must make a Wisdom saving throw against your spell save DC, or be Frightened of you until the end of your next turn.