Peridot and Amethyst fuse to make, Euclase
gems are on the sternum and the small of her back.
Their weapon are the manacles/bracelets on their wrists.(iron rings) They serve as arm braces/shields and make their punches harder.
outfit based off of this and this (forth row, last image on the right)
steven universe © Rebecca Sugar &cartoon network
characters, designs, artwork © me