Hidden Gem Golem Damage Types

[Matrix]

So, I bashed my head against some luminous horrors for a few minutes before asking people in chat what the hell was going on, because my golem was healing the goddamn horrors with every bump! Turns out that the gems I have in my golem are yellow, and this means that it now does light damage. While it does mention in the skill description for Gem Golem that the gems change the damage type the golem does, I think it needs to be clearly stated on the gems themselves exactly what damage type they make your golem do, instead of a vague system of colours - which makes no sense, by the way, seeing as topaz is classified as blue, even though the icon is clearly yellow - because this was really irritating. As it stands, I think the lack of clearly displayed information here is quite the oversight.