Drop chance is not the same for all elements???

[Alsona]

I do not know if its bug, but I am farming shadow earring from xanos since sunday. Now its wednesday and still nothing! How could be drop chance same for all elements, if I can see drop 5 times flame or lightning and shadow never? 4 days is not just unluck

[Grimzy]

i actually got a shadow one yesterday.....drop chance is the same but its random which you get. You are just unlucky.