Guild Wars 2

We should be able to do something with transmutation stones, such as putting 4 into the forge to get a transmutation crystal. For players who level alts and do their dailies, the number of these near-useless objects gets pretty ridiculous, and transmutation crystals are actually quite useful.

When the game released you use to get a lot of the now called transmutation crystals, I remember I was lvl 20~25 I ad 10~15 already so I always thought they would be pretty common, but no, even before I could hit lvl80 they just stopped appearing.
I think ANET got them off the loot table all together and thats because they want/need you to buy them with gems.
Getting stones together to make a crystal would defeat the purpose.

And the stones aren’t so bad, for my alts I actually got some nice looking high lvl armor and been transmutating them as I find stronger pieces so they look great since the start without needing to worry about running out of stones.