Alchemy, branch-opener reagents

[GoD1x]

Yesterday I was offered two rakshasa's eyes for free, but I declined, due to the fact that I had no recipes using them and they're too hard to acquire for retrials if anything useful was made with them.
That set me thinking a bit - shouldn't the naturally occuring object be better to have than the alchemical substitute?

So my suggestion is that the naturally occuring objects, [REDACTED] etc., react with reagents in the same way that the alchemical substitute does. Meaning that adding earth, fire and negative shards would give the same result with either branch-opener. And then adding onto that, the naturally occuring objects should have a higher value than the substitute, so the creation would form easier.
 
Hoping it made sense!

[RuinedDesires]

What if a store existed, selling the regeants for around 100-150 mark. That way adventurers could sell them for profit, and alchemists could buy them if none were immediately available.

[GoD1x]

I like the fact that the natural ones are rare. It makes little sense to me if we're suddenly "flooded" with something that really should be rather rare.
I get the point that they are different ingredients - I just felt that it would make sense if they were a better ingredient to make use of, to give credit to the rarity.
Being able to use them in the same way as the alchemical ones seemed a good way and could be explained by that you use the essence of the object(Law, Evil, Earth etc) through titration, magical extraction or the like.