The folk saying is that the fish tank is very strong to promote wealth, amethyst placed in the home has the effect of gathering wealth. Amethyst placed in the fish tank will be more money.

Purple crystal, also known as amethyst, is the only crystal family in the purple system of crystal, mysterious and romantic color makes it deserved to become a member of the crystal in the most noble and beautiful. For the record, the answer is for reference only, please do not blindly superstitious.