athenaworth|1396312947|3644675 said:Iron inhibits fluorescece. Ruby that forms in basalt has higher iron content. Fluorescence is said to be what gives ruby it's trademark glow. Higher iron can also make it have more brown.
athenaworth|1396312947|3644675 said:Iron inhibits fluorescece. Ruby that forms in basalt has higher iron content. Fluorescence is said to be what gives ruby it's trademark glow. Higher iron can also make it have more brown.