Like the calcium phosphate stones, struvite stones are dirty white and radiopaque under an X-ray.

磷酸钙一样，鸟粪灰白色的，在X线片不透光的。

A tiny minority of stones are cystine stones, composed of the amino acid cystine which sometimes leaks into the urine to crystalize and form a yellow or light pink colored stone that is radiopaque under X-ray.

有一小部分胱氨酸，胱氨酸渗入液后晶形成黄色或者淡粉色的，在X线下不透光的。