Red Stone of Aja

Story
A perfect gemstone, sought by the Pillar Men in order to greatly focus sunlight; in conjunction with the stone mask, it would finally enable them to withstand sunlight.

About 2,000 years ago, this perfect stone was in possession of an unnamed Roman Emperor. Cars, ACDC and Wham went after it, but were defeated and imprisoned by the Hamon warriors of the time. The stone was passed down among Hamon users, eventually ending up in the possession of Lisa Lisa during Part 2. During the final battles of Part 2, Cars was able to use the Red Stone of Asia to become the ultimate life form.

The reason it was not destroyed earlier was because, there was a legend passed down with the stone warning that destroying it would make defeating Cars, Wham and ACDC more difficult, thus preventing the Hamon users from disposing of it.