Purple Tanzanite is the fusion of Amethyst and Onyx in the Legend of Sapphire series.
The fusion has a female appearance being slightly taller then Jasper with a well built body, long dark purple hair, and two eyes, one that has black pupils and the other having purple pupils. She has the same plump lips that Amethyst has as well as Onyx's nose with violet colored skin. She wears armor similar to Onyx that is dark purple with violet detail with spikes on the shoulder like Onyx has. This fusion also wears a black cape that is slightly tattered. The gems on this fusion are dark purple, one being at the forehead which is Onyx's part of the fusion and Amethyst's being at the chest.
When these two lovers fuses, they become an unstoppable force. Combining Onyx's seriousness and focus with Amethyst's wild and rapid attacks makes them a true threat in battle. The fusion has many traits of the two gems, including Amethyst's wild, ferocious, and level-headed personality as well as Onyx's serious, disciplined, and focused personality giving them the best of each others traits.
- Shadow controlling powers
- Summon duel versions of their weapon
- Spinball attack
- Fire rays of nightmares
- Create black holes
- Summon shadow minions for battle
- Can perform whiplash with their weapon
Combining the rapid movement of Amethyst's whip with Onyx's staff makes it an unstoppable Kusarigama chain weapon for battle. The bottom half of the staff is used as the handle for the weapon with the whip used as the chain that connects the weapon. The top half of Onyx's staff is used as the blade of the weapon with the black hole on the top changing into a blade of dark matter. The movement of this weapon is swifter then any other making this a devastating force to recon with. The blade is so sharp that it can literally cut through anything that touches the blade.
- This is the first fusion Onyx does that isn't with his brothers.
- Amethyst can still perform her spinball in the fusion.
- In the episode, Stuck Together, Onyx and Amethyst will be stuck in their fusion along with Emerald and Garnet, Sapphire and Pearl, and Lapis and Steven.