Abilities and personality for a manganotantalite?
Manganotantalite doesn’t have much information on it so I’ll be using tantalite scientific and metaphysical properties too. And in this case, I will speak for both tantalite and manganotantalite.
Abilities: Tantalite (as well as manganotantalite) is an tantalum ore. Tantalum is a chemical element. The main use for tantalum is the production of electronic components and because of its thin oxide layer, it can coat other metals and achieve high capacitance (or be able to store electric charge). Your gem could have electricity manipulation who can store a large amount of electricity to release a powerful blast. Tantalum is very resistant to erosion and has strong alloys that are used for turbine blades, rocket nozzles and nose caps for supersonic aircraft. Metaphysically, tantalite is called “the stone of foundation”, providing as a grounding and very protective stone. Your gem could create a protective shield around themselves that could take in heavy blows from opponents. Earth and metal manipulation could also be considered. The name Tantalum comes from the Tantalus, a character of Greek mythology who was punished for all eternity for his crimes against the Gods. Tantalus is placed in a lake under a fruit tree. He cannot drink or eat the fruit off the tree as they would recede from his grasp. Your gem could have a kind of torment inducement or imprisonment ability.
Personality: Tantalite/Manganotantalite is a tough and courageous gem who’s usually the backbone of groups. They come across as intimidating and unfriendly: many don’t want to approach them. It’s easy to get on this gem’s nerves as they take a lot of things defensively. They’re also quite dense and a lot of things fly over their heads. When approaching a problem, Tantalite/Manganotantalite would much rather use their fists to solve it. This violent attitude comes from a specific place: they’re a protector. They must be strong and rash because this is the only way they know how to protect their loved ones. They will do as much as possible to avoid looking weak, often guarding their feelings or emotions from others. In secret, Tantalite/Manganotantalite take on creative activities.