Pure fresh water pearl powder can be taken orally or used externally. It's not pure pearl powder. It's useless and can't be used.
First, popularize the knowledge of pearl powder. Pearl powder is generally made by grinding fresh water pearls.
If seawater pearls are denuded, they cannot be directly made into pearl powder, so the possibility of denucleating many pearls is almost zero.
Therefore, seawater pearls cannot be pure pearl powder, while freshwater pearls are pure pearl powder.
Zhenshichang is a freshwater pearl of Taihu Lake. At that time, the Pearl of Taihu Lake was used by Cixi.
Taihu Lake high-quality fresh water pearl powder can be taken orally, but generally the quality of fresh water pearl powder is very poor, so it cannot be taken orally.
If the price is too low, it is not pearl powder at all, and inferior pearl powder will have a smelly taste.
Suzhou time-honored Zhenshichang, pearl powder price 2 18 yuan 26g (cheap in JD.COM/Taobao).
Inferior fake pearl powder is either black or white. Black is because it contains shells, or improper technology leads to powder deterioration. White is due to the addition of bleach and other ingredients. Inferior fake pearl powder will give off an unpleasant smell when rubbed by hand.