An X-Fractor is a specific type of refractor parallel that features a distinctive "X"-shaped refraction pattern across the card's surface. Where standard refractors have a uniform shimmer, X-Fractors have intersecting lines that create an unmistakable X pattern when the light hits them.
X-Fractors are part of the broader refractor family and are typically produced in more limited quantities than base refractors. They're a key piece of any rainbow chase and stand out visually from every other refractor type.
If you're flipping through a stack of Chrome cards and spot that X pattern catching the light, you've got something special in your hands. X-Fractors are one of those parallels that collectors can identify instantly from across the table.