They'll figure out a way eventually, but it is definitely harder.
It is always easy to grow something uniform as a pure crystal, without fault lines on them causing crumbling.
As a kid who spent a lot of time with chemistry, it used to fascinate me that you can crystallize out a clean salt crystal out of a mix of potassium permanganate and salt, the salt grain will grow pretty much pure salt on it without a hint of purple (also burned my nose skin off collecting chlorine from the exercise, talk to your local chemistry teacher and find out why).
I never succeeded in making a colored salt transparent crystal.
They'll figure out a way eventually, but it is definitely harder.
It is always easy to grow something uniform as a pure crystal, without fault lines on them causing crumbling.
As a kid who spent a lot of time with chemistry, it used to fascinate me that you can crystallize out a clean salt crystal out of a mix of potassium permanganate and salt, the salt grain will grow pretty much pure salt on it without a hint of purple (also burned my nose skin off collecting chlorine from the exercise, talk to your local chemistry teacher and find out why).
I never succeeded in making a colored salt transparent crystal.