Red Stone of Aja

Also called the Super Aja and pronounced much like the word Asia, this jewel counts among the most celebrated treasures in the franchise. Roughly two millennia before the story, a Roman emperor kept it, and Kars along with Esidisi and Wamuu hunted it down. Their raid wiped out a whole Ripple clan, yet the gem eluded them, and the trio were sealed into slumber within a wall of stone.

Guardianship of the crystal then fell to the Ripple lineage. An old warning kept them from smashing it, since legend held that breaking the stone would only make the Pillar Men harder to beat. Handed down through clan leaders for generations, it reached Master Straizo, who passed it to Lisa Lisa shortly before he died during Battle Tendency.

The stone's power lies in light. It soaks up illumination, refracts it countless times over inside itself, then discharges the stored energy as a laser-like ray. Fitted into a Stone Mask, it lets a Pillar Man reach his true ceiling, erasing every frailty the species carries, above all the fatal reaction to sunlight.

That same property makes the gem a decisive weapon in the wrong hands. At the climax of Battle Tendency, Kars mounted it in his custom mask just as ultraviolet light flooded him, and the fusion turned him into the ultimate form of life. When the ruined mask dropped the stone, Joseph seized it, and later he instinctively raised it to catch Kars' final assault, bending the villain's own Ripple into a torrent that pierced the volcano below and hurled him into space.

Lisa Lisa carried the crystal through much of Battle Tendency, hiding it across Venice and Switzerland and even rigging it with a timed explosive to force the Pillar Men into single combat. Kars ultimately stole it by deceiving her mid-duel, using it to complete his transformation. Joseph Joestar handled it repeatedly, recovering it after it slid off a cliff and again after it fell from Kars, and finally wielding it to trigger the eruption that ended the fight. Where the stone went afterward is never revealed.