Exchange of Yellow rough-stones

I also made more than a hundred general exchanges with Yellow rough-stones, there was not any HQ Obsidian just like there wasn't any HQ Spodumene at red, however there was a GQ Obsidian, let's see the others:

Exchange of Red rough-stones

Almost a hundred of red rough-stones exchanged with general and didn't get a single GQ or HQ Spodumene... Got these instead:

Exchange of Green rough-stones

Now i used all my collected Green rough-stones with General exchange and get these as a result:

Exchange of Blue rough-stones

I usually wait with exchange of the rough-stones till i get a big amount, now i waited till to get a hundred, so i may can make nice table about how it randomly give us the Jewels, i used General exchange everytime and got this as a result: