Goldline

Goldline, also called cacoxenite, was the name given to varieties of quartz with lines of gold-colored goethite (an iron oxide impurity) embedded in the matrix.

Description
These quartz ornamental stones could be citrine, amethyst, or smoky quartz tumbled or cut cabochon. Specimens could be two to three inches (five to eight centimeters) in diameter with the bright yellow strands of goethite running in parallel lines. Sometimes large pieces were found, but these were subject to breakage during travel. A typical stone had a base value of 10 gp.