> They identified organic matter and calcium crystals with ultraviolet light, which uses different wavelengths to make distinct minerals glow. > A high-resolut

> They identified organic matter and calcium crystals with ultraviolet light, which uses different wavelengths to make distinct minerals glow. > A high-resolution method, called Airyscan super-resolution microscopy, captured colorful snapshots of organic matter and crystal layers in the kidney stones, “crosscut and truncated” by newer crevices, triangles and other geometrics, Dr. Fouke said.