Mabel's - Sunstone's - gem was shaped in a perfect semicircle, the flat part of it facing down to resemble a setting (or rising) sun in the horizon, and resting comfortably just below her clavicle. It was sparkling and glittery, exploding in fiery reds and bright oranges and neon yellows. Its edges were smooth, its surface warm, its size just right for pulling a crossbow out of.
And Dipper's - Moonstone's - gem was, in contrast with its twin's bombastic color, pale and subtle, slightly iridescent, white and blue and purple and glimmering and storing a shortsword by magic. Shaped like a semicircle the same way, but with the flat part of it facing up and located just above where his heart would've been, if he were fully human.
But he wasn't. And neither was she. And neither was their guardian, or enemy. But that's for another story.
Gem weapons were hard to procure, yet for some reason both the twins felt more empowered after a summoning, rather than drained as most young in-training gems would be. This was to be expected, considering the history they, or at least their past-selves had with battles and wars, whether they were aware of this fact or not.
Speaking of weapons, theirs were still quite of a simple design. Dipper's shortsword was just that at the moment - a sharp blindingly white blade, a handle, triangular pommel and guard of differing shades of blues. Currently, nothing special has happened when training with Stan, but that could change, of course. Like Mabel; her crossbow once glowed and developed a 'stun' setting rather than impale, because she had been too queasy to even think about killing gnomes. Her reason-slash-excuse, even though neither Dipper nor anyone else of importance really asked, was that they were pretty humanoid for one of Gravity Fall's creatures. And shooting humanoid beings would give her the heebie-jeebies. Her crossbow, which was more of a slingshot with a trigger at the moment than anything else. Fiercely orange frame and endless yellow arrows, with pale red wires and gears doing the rest of the work.
Strictly speaking, the kids had a long way to go before they could serve as real value to the effort against Homeworld. Until then, further research will be postponed.
And also, their bodies change color when their gem sides are activated. This was another thing Bill felt he wanted to keep in mind.
-CP-
Sorry for a short one. Tomorrow there'll be two.