So if you overgrind you might end up with something duller, or with another color if you grind it very fine; you might end up with a purple rather than a blue.

所以如果你过度研磨， 你可能会得到更暗淡的东西，或者如果你研磨得非常细， 就会得到另一种颜色； 您最终可能会得到紫色而不是蓝色。