"Brecciated"" is a geological term meaning ""composed of angular fragments."" A stone that was once shattered, then recemented by a different mineral. The evidence of fracture and repair is preserved directly as pattern.
Tectonic activity broke the jasper apart. Silica and iron oxide flowed into the cracks and solidified, binding the fragments back together. Because the original stone and the binding mineral differ in colour, a distinctive mosaic emerges.
A stone that broke and became whole again. Unbroken specimens lack this complexity of expression.