Peridot: This is no ordinary injector. Whatever it's leaking into the ground is toxic. Let's get a scan going and see what we're dealing with. Just as I thought. Bio-poison. Pure and uncut. As of this moment, the ampoule has drained 15.4% of its contents, meaning the poison is releasing at a destruction rate of 5 cubic meters per hour, giving us, hmmm... 41 hours until the destruction of all organic life on Earth.
|—Peridot & Steven, Steven Universe: The Movie|
Spinel's Injector was a massive construct designed to inject a toxic biological substance into the earth which destroys all life it comes in contact with. Spinel brought the injector to Earth to take revenge against Steven Universe and the other Crystal Gems after she was abandoned by Pink Diamond. Within a fit of rage, Spinel forced it further into the ground, making it explode and forcing the town to need to be saved by Alexandrite.
It had a black-accented hourglass-shaped body with a pop-out drill and three foldout spider-like legs at its base. There was a large hot-pink gemstone-like object with a heart-shaped facet that resembled Spinel's gemstone at the top.
Instead of draining life from a surrounding area to create new Gems this injector delivers a type of poison called "Bio-Poison" which kills all organic life including (but not limited to) plants, animals, insects, and people. According to Peridot, the poison would have been potent enough to destroy all life on Earth in 41 hours (1 day, and 17 hours). The poison appears to paralyze any organic matter when the poison comes into contact with it as seen when Greg Universe came into contact with the poison and got his left arm completely paralyzed. If the machine is disturbed or tampered with its injection rate accelerates. Additionally, excessive damage to the injector can cause it to explode which was its ultimate fate after Spinel's fight with Steven crushed the top of it.
This injector can be freely and easily controlled by Spinel herself through a horn created from her elasticity. It can be activated, deactivated and even sped up through her horn, the final command of which pumps the poison at such a rate that it overflows from the injection site, however in doing this, causes to poison to be unable to properly settle and destroy the planet, making the poison useless.
- It was confirmed during a book signing that this injector, along with the Gem Rejuvenator, belonged to Pink Diamond prior to her demise.
- It is not known when, why, or how either of the first two weapons was developed, but Spinel apparently had access to them both due to being Pink's best friend. It is never made clear exactly where and how Spinel found these weapons.
- The injector can hold and release up to about 237 cubic meters worth of bio-poison.
- The injector looks similar in appearance to that of a bacteriophage.