I already have Slate and according to my personal farming statistics, I see Slate the most. I've seen Jade and Amber only a couple of times. And I've had Slate drop for me 3 times. Jade is easily discernible but Slate and Amber are harder to tell apart until you look closer, but usually by that time I've already engaged in combat and I feel like an asshole when I just want the kill not caring if another Slate mount drops.
Alright you bastard, lets see who tags it first!. I start casting Hellfire right on the spawn point. Warbringer pops and I get the tag first. And this cry baby has something to say. It's not luck fucker!! that skillz!!! sooo kidding. haha. Clicking something to cast and waiting 10 seconds to click again isn't very skillfull. hush! Still, I'm good at it. :-P
Aaaand it's a Slate... poops! My next move would have been frowned upon by most. I rewarded this douche for being an asshole pretty much. I should have just finished my kill and if the mount dropped just rub it in his face. But I decided to be nice and give it to him. I told him to come back and by his response, he had no idea why. Who in their right mind would give up a Warbringer kill, even after his derogatory comment. After getting the Warbringer down half way I demonic lept off the cliff and meteored safety down so I was out of range and the Druid's spells could resume the tag on target. I mounted up and flew away. then he whispered a thanks. My main objective for what I did was show that some people are nice in this game. As pessimistic as I am about the morality of most players, sometimes me included, I do hope kindness goes a long way.